The House of the Moon is a temple of Selûne in the city of Waterdeep on the Sword Coast North.

It is one of the largest temples in the city.

The House of the Moon stands in the Sea Ward of Waterdeep and faced the south side of Diamond Street between Seawatch Street and the Street of Whispers. Running around the temple on the east, west, and south sides was a passage known as Moonlit Alley.

It stands two blocks east of the West Gate and opposite the Tchazzam family villa, and further east lay the Moonstar family villa. It is one of the most significant temples of the Sea Ward.

https://forgottenrealms.fandom.com/wiki/House_of_the_Moon