St. Basil's Cathedral
From the Super Mario Wiki
St. Basil's Cathedral (Russian: Собор Василия Блаженного, Sobor Vasiliya Blazhennogo) is a famous church in Moscow known for its onion domes. One of those Cathedral Domes has been stolen by Koopa Troopas in Mario is Missing!, causing the entire structure to be closed down, and Luigi has to return it to its rightful place in the cathedral. After obtaining the Dome and bringing it to the appropriate information booth, Luigi must prove that it is genuine by answering some questions, which are as follows:
This strange and wonderful church was built in 1555 by Duke Ivan III,[sic] known as Ivan the Terrible. He ordered the church built to honor the holy fool, St. Basil. (Holy fool is the name for a saint in Russia.) The famous 'onion' domes were added later in the 16th century. Although the church appears to have no real design, the building was carefully built as one large chapel surrounded by eight, dome-topped chapels. Every room is painted in different patterns and colors.