Oura Church (大浦天主堂, Ōura Tenshudō) is a Catholic church in Nagasaki. Built towards the end of the Edo Period in 1864 by a French missionary for the growing community of foreign merchants in the city, it is considered the oldest standing Christian church in Japan.
Oura Church is dedicated to the memory of the 26 Christians who were executed in the city in 1597. Today, the working church stands as an attractive example of contemporary European architecture, drawing many visitors. The church was the first Western-style building in Japan to be designated as a national treasure.