During the Protestant Reformation in the early 16th century, the city of Bern adopted the new Protestant faith and the city's churches converted, leaving the remaining Catholics in Bern without a church. Over the following centuries, they remained without a church in the city. Following the French invasion of Switzerland in 1798 and the political reforms of the Helvetic Republic, the catholic community of Bern held mass in the choir of the Bern Minster until 1803. Beginning in 1804 they moved to the French Church on Zeughausgasse.