When it comes to having any Great Building in the game, you have to decide if it’s worth keeping. Some GBs end up being stepping-stones to other GBs, and therefore you want to level them as little as possible so you don’t waste resources. Any GB worth keeping though, is worth taking to level 10. You can usually do this fairly easily with some of the low-age GBs between an active Sticks to Bricks thread and then general FP swap threads, but the higher-age GBs get pretty expensive pretty fast, so having the ability to use locks from Power Arcs is really nice.

This article won’t tell you what GBs are best for you to build, you’ll want to check out the Comprehensive Guide to Great Buildings for that. It will however tell you what kind of investment you are looking at for any GB you’re considering building, making it a great companion article.

Below you will find charts for all the GBs in the game (except Oracle of Delphi) to use 1.9 locks to take them to level 10. Conveniently, GBs of the same era will share the same locks so there is essentially one chart per era. In addition Observatory and Temple of Relics (GBs without a specific era) share lock rates as well. The reason Oracle of Delphi is not included is because that GB is meant to be a teaching tool by FoE. As such, let it also be a teaching tool on using lock math should you actually wish to keep this one.

Please note that when using these charts there are many spots where there are no FPs as a prize. All these spots are labeled with a “1”, intending for you to offer the BPs to guild mates. Where you see multiple instances of “1” in a row, you’ll want to use the lowest number to set up for locks so that you leave room for all the spaces that are BP only (should you be willing to offer them at 1 FP a piece). In addition sometimes 3 is safe after making 1/2 safe, this will be noticeable if the amount needed to make 3 safe is less than the amount needed to make 1/2 safe. Any time you see an instance in the chart where there are multiple “1”s in a row, or where the next amount to create a safe lock has a lower number than the previous amount needed to make a lock safe, use the lower number. This ensures room for additional FP donations, and it should not make the earlier spaces snipable.

This article is current to: Space Age Asteroid Belt

Use the following links to quick-jump to a specific era of charts:

Alcatraz | Arc | Arctic Orangery | Atlantis Museum | Atomium | Blue Galaxy | Cape Canaveral | Capitol | Castle del Monte | Cathedral of Aachen | Château Frontenac | Colosseum | Deal CastleFrauenkirche of Dresden | Gaea Statue | Habitat | Hagia Sophia | Himeji Castle | Innovation Tower | Kraken | Lighthouse of Alexandria | Lotus Temple | Notre Dame | ObservatoryRain Forest Project | Royal Albert Hall | St. Basil’s Cathedral | St. Mark’s Basilica | Seed Vault | Space Carrier | Space Needle | Star Gazer | Statue of Zeus | Temple of Relics | Terracotta Army | Tower of Babel | The Virgo Project | Truce TowerVoyager V1

No Era: Observatory and Temple of Relics

Getting to
ToR/Obs
Level
Cost to
Level
First Place
Lock
Second Place
Lock
Self Donation
1/2 Lock
Third Place
Lock
Self Donation
1/2/3 Lock
Fourth Place
Lock
Self Donation
1/2/3/4 Lock
Fifth Place
Lock
Self Donation
1/2/3/4/5 Lock
150101030128127126
270191032139138137
31302919721062170169
420038191241012311311130
527057291561016411721171
633067381961020512131212
7420864824819248102471255
8490954830019309103081316
95701145734219361103601368
106501246740219421104201428

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Bronze Age: Statue of Zeus and Tower of Babel

Getting to
Zeus/Babel
Level
Cost to
Level
First Place
Lock
Second Place
Lock
Self Donation
1/2 Lock
Third Place
Lock
Self Donation
1/2/3 Lock
Fourth Place
Lock
Self Donation
1/2/3/4 Lock
Fifth Place
Lock
Self Donation
1/2/3/4/5 Lock
140101020118019019
260191022129128029
3100191062169168167
41502919921082190189
521048291141011311211120
627057291561016411721171
733067381961020512131212
838076382281024612541253
9450864827819278102771285
105101055730019310103091317

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Iron Age: Colosseum and Lighthouse of Alexandria

Getting to
Col/LoA
Level
Cost to
Level
First Place
Lock
Second Place
Lock
Self Donation
1/2 Lock
Third Place
Lock
Self Donation
1/2/3 Lock
Fourth Place
Lock
Self Donation
1/2/3/4 Lock
Fifth Place
Lock
Self Donation
1/2/3/4/5 Lock
140101020118019019
260191022129128029
31202919621052160159
4170381994109311011100
522048291241012311311130
629057291761018411921191
736076382081022612341233
8420864824819248102471255
9490954830019309103081316
105501145732219341103401348

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Early Middle Ages: Cathedral of Aachen and Hagia Sophia

Getting to
CoA/Hagia
Level
Cost to
Level
First Place
Lock
Second Place
Lock
Self Donation
1/2 Lock
Third Place
Lock
Self Donation
1/2/3 Lock
Fourth Place
Lock
Self Donation
1/2/3/4 Lock
Fifth Place
Lock
Self Donation
1/2/3/4/5 Lock
150101030128127028
260191022129128029
31202919621052160159
419038191141011311211120
524048291441014311511150
632067381861019512031202
738076382281024612541253
8460954827019279102781286
95301055732019330103291337
106001246735219371103701378

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High Middle Ages: Notre Dame and St. Mark’s Basilica

Getting to
SMB/ND
Level
Cost to
Level
First Place
Lock
Second Place
Lock
Self Donation
1/2 Lock
Third Place
Lock
Self Donation
1/2/3 Lock
Fourth Place
Lock
Self Donation
1/2/3/4 Lock
Fifth Place
Lock
Self Donation
1/2/3/4/5 Lock
150101030128127126
280191042149148147
31402919821072180179
421048291141011311211120
529057291761018411921191
636076382081022612341233
7440864826819268102671275
85301055732019330103291337
96101246736219381103801388
107001336743419462104611469

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Late Middle Ages: Castle del Monte and St. Basil’s Cathedral

Getting to
CdM/SBC
Level
Cost to
Level
First Place
Lock
Second Place
Lock
Self Donation
1/2 Lock
Third Place
Lock
Self Donation
1/2/3 Lock
Fourth Place
Lock
Self Donation
1/2/3/4 Lock
Fifth Place
Lock
Self Donation
1/2/3/4/5 Lock
150101030128127126
280191042149148147
31402919821072180179
421048291141011311211120
529057291761018411921191
636076382081022612341233
7440864826819268102671275
85301055732019330103291337
96101246736219381103801388
107001336743419462104611469

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Colonial Age: Deal Castle and Frauenkirche of Dresden

Getting to
Deal/FoD
Level
Cost to
Level
First Place
Lock
Second Place
Lock
Self Donation
1/2 Lock
Third Place
Lock
Self Donation
1/2/3 Lock
Fourth Place
Lock
Self Donation
1/2/3/4 Lock
Fifth Place
Lock
Self Donation
1/2/3/4/5 Lock
150101030128127126
290191052159158157
31502919921082190189
422048291241012311311130
531067381761018511931192
638076382281024612541253
7480954829019299102981306
85601145733219351103501358
96501246740219421104201428
107401437645419483104821490

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Industrial Era: Capitol and Royal Albert Hall

Getting to
Cap/RAH
Level
Cost to
Level
First Place
Lock
Second Place
Lock
Self Donation
1/2 Lock
Third Place
Lock
Self Donation
1/2/3 Lock
Fourth Place
Lock
Self Donation
1/2/3/4 Lock
Fifth Place
Lock
Self Donation
1/2/3/4/5 Lock
160191022129128127
290191052159158157
31503819741073181180
424048291441014311511150
533067381961020512131212
6410864823819238102371245
7500954831019319103181326
86001145737219391103901398
96901336742419452104511459
107901527648629504105131521

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Progressive Era: Alcatraz and Château Frontenac

Getting to
CF/Traz
Level
Cost to
Level
First Place
Lock
Second Place
Lock
Self Donation
1/2 Lock
Third Place
Lock
Self Donation
1/2/3 Lock
Fourth Place
Lock
Self Donation
1/2/3/4 Lock
Fifth Place
Lock
Self Donation
1/2/3/4/5 Lock
160191022129128127
290191052159158157
3170381994109311011100
426057291461015411621161
534067382061021512231222
6440864826819268102671275
75301055732019330103291337
86301246738219401104001408
97401437645429463104721480
105331628620929227102361244

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Modern Era: Atomimum and Space Needle

Getting to
Atom/SN
Level
Cost to
Level
First Place
Lock
Second Place
Lock
Self Donation
1/2 Lock
Third Place
Lock
Self Donation
1/2/3 Lock
Fourth Place
Lock
Self Donation
1/2/3/4 Lock
Fifth Place
Lock
Self Donation
1/2/3/4/5 Lock
160191022129128127
2100191062169168167
318038191041010311111110
427057291561016411721171
536076382081022612341233
6460954827019279102781286
75601145733219351103501358
86701336740419432104311439
97701527646629484104931501
108801718653829565105741582

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Post-Modern Era: Cape Canaveral and Habitat

Getting to
Cape/Habitat
Level
Cost to
Level
First Place
Lock
Second Place
Lock
Self Donation
1/2 Lock
Third Place
Lock
Self Donation
1/2/3 Lock
Fourth Place
Lock
Self Donation
1/2/3/4 Lock
Fifth Place
Lock
Self Donation
1/2/3/4/5 Lock
160191022129128127
2100191062169168167
318038191041010311111110
427057291561016411721171
536076382081022612341233
6460954827019279102781286
75601145733219351103501358
86701437638429393104021410
97701628644629464104731481
108801819551829546105551563

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Contemporary Era: Innovation Tower and Lotus Temple

Getting to
Inno/Lotus
Level
Cost to
Level
First Place
Lock
Second Place
Lock
Self Donation
1/2 Lock
Third Place
Lock
Self Donation
1/2/3 Lock
Fourth Place
Lock
Self Donation
1/2/3/4 Lock
Fifth Place
Lock
Self Donation
1/2/3/4/5 Lock
160191022129128127
21002919421032140139
318038191041010311111110
427057291561016411721171
536076382081022612341233
64601055725019260102591267
75601246731219331103301338
86701437638429393104021410
97701628644629464104731481
108801909550029537105461554

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Tomorrow Era: Truce Tower and Voyager V1

Getting to
V1/TT
Level
Cost to
Level
First Place
Lock
Second Place
Lock
Self Donation
1/2 Lock
Third Place
Lock
Self Donation
1/2/3 Lock
Fourth Place
Lock
Self Donation
1/2/3/4 Lock
Fifth Place
Lock
Self Donation
1/2/3/4/5 Lock
170191032139138137
21002919421032140139
319038191141011311211120
428067381461015511631162
5380864820819208102071215
64801055727019280102791287
75901246734219361103601368
87101527640629424104331441
98101718646829495105041512
1093020010553038549105671575

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Future Era: Arc and Rain Forest Project

Getting to
Arc/RFP
Level
Cost to
Level
First Place
Lock
Second Place
Lock
Self Donation
1/2 Lock
Third Place
Lock
Self Donation
1/2/3 Lock
Fourth Place
Lock
Self Donation
1/2/3/4 Lock
Fifth Place
Lock
Self Donation
1/2/3/4/5 Lock
170191032139138137
21102919521042150149
320048291041010311111110
429067381561016511731172
5400864822819228102271235
65101145728219301103001308
76201336735419382103811389
87401628641629434104431451
98601819549829526105351543
1097020910555238580105981606

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Arctic Future: Arctic Orangery, Gaea Statue, and Seed Vault

Getting to
AO/Gaea/SV
Level
Cost to
Level
First Place
Lock
Second Place
Lock
Self Donation
1/2 Lock
Third Place
Lock
Self Donation
1/2/3 Lock
Fourth Place
Lock
Self Donation
1/2/3/4 Lock
Fifth Place
Lock
Self Donation
1/2/3/4/5 Lock
180191042149148147
21202919621052160159
323048291341013311411140
434067382061021512231222
5450864827819278102771285
65801145735219371103701378
77101437642429433104421450
88501628652629544105531561
99801909560029637106461654
10111021911467238701107191727

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Oceanic Future: Atlantis Museum, Blue Galaxy, and Kraken

Getting to
Kraken/AM/BG
Level
Cost to
Level
First Place
Lock
Second Place
Lock
Self Donation
1/2 Lock
Third Place
Lock
Self Donation
1/2/3 Lock
Fourth Place
Lock
Self Donation
1/2/3/4 Lock
Fifth Place
Lock
Self Donation
1/2/3/4/5 Lock
180191042149148147
21302919721062170169
324048291441014311511150
435067382161022512331232
5470954828019289102881296
66101246736219381103801388
77401437645429463104721480
88801718653829565105741582
9102020010562038639106571665
10116022811470438742107601768

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Virtual Future: Himeji Castle and Terracotta Army

Getting to
TA/HC
Level
Cost to
Level
First Place
Lock
Second Place
Lock
Self Donation
1/2 Lock
Third Place
Lock
Self Donation
1/2/3 Lock
Fourth Place
Lock
Self Donation
1/2/3/4 Lock
Fifth Place
Lock
Self Donation
1/2/3/4/5 Lock
190191052159158157
21302919721062170169
324048291441014311511150
437076382181023612441243
5490954830019309103081316
66301246738219401104001408
77701527646629484104931501
89101819554829576105851593
9106020910564238670106881696
10121023812473438772107901798

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Space Age Mars: Star Gazer and Virgo Project

Getting to
Virgo/SG
Level
Cost to
Level
First Place
Lock
Second Place
Lock
Self Donation
1/2 Lock
Third Place
Lock
Self Donation
1/2/3 Lock
Fourth Place
Lock
Self Donation
1/2/3/4 Lock
Fifth Place
Lock
Self Donation
1/2/3/4/5 Lock
190191052159158157
21402919821072180179
325048291541015311611160
438076382281024612541253
55201055731019320103191327
66501336738419412104111419
78001527649629514105231531
89401819557829606106151623
9111021911467238701107191727
10125023812477438812108301838

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Space Age Asteroid Belt: Space Carrier

Getting to
SC Level
Cost to
Level
First Place
Lock
Second Place
Lock
Self Donation
1/2 Lock
Third Place
Lock
Self Donation
1/2/3 Lock
Fourth Place
Lock
Self Donation
1/2/3/4 Lock
Fifth Place
Lock
Self Donation
1/2/3/4/5 Lock
190191052159158157
21502919921082190189
326057291461015411621161
439076382381025612641263
55401055733019340103391347
66701336740419432104311439
78301628650629524105331541
89901909561029647106561664
9114029111455838659106771685
10130024712480638853108711879

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