Which Legendary Building would be the "cheapest" to level up to the next level?
You can quickly calculate this here. The green marked LG is the next one with the smallest own contribution.

If you are logged in, your current levels, if any, will be entered automatically.

Investment Calculator v1.2
Arc BonusHagia SophiaCastel del MonteCape CanaveralInnovation TowerArctic OrangeryThe Kraken
Actual level
Forge Points actual=
Forge Points Next level
Ownpart
Next level
Gesamt LG-Forge Points

You have just received a large amount of forge points and want to level up another legendary building as quickly as possible in Forge of Empires, the online strategy game?
Before you click into each of your legendary buildings, use the tool and ask what is worthwhile with just a few details. Our FOE calculator is not a forge of empire cheat, but a legal way to optimise your game in Forge of Empires.