This is available for free when placed during the Romantic Buildings! Goal and takes 0 Energy to build. Once built, it increases your city's population by 10 Population. Rent can be collected every 15 minutes and earns 50 Coins.
Upgrading this requires 2 different items to be collected and combined into a third item to complete each level. The first item required will change for each level, while the second and third items will be the same. The amount of each item will increase for each item. Each level will increase the population's minimum and maximum amount.
Completing each level will reward the player and their building partner (if any) with a reward.
Additional Royal Weddings can be bought for 5,000 Coins.
Note: This is also categorized as a business, but does not use any Goods.