"It was a strange feeling because of the musical instruments, the pictures," said worshipper Samer Hamdoun. "But when you look, when you forget the small details, this is the House of God in the end..."
The Islamic Council, an umbrella group of 400 mosques, said in April that many face bankruptcy because the closures stretched into the holy fasting month of Ramadan, usually a vital period for donations.
The church's pastor, Monika Matthias, said she had felt moved by the Muslim call to prayer.
"I took part in the prayer," she said. "I gave a speech in German. And during prayer, I could only say yes, yes, yes, because we have the same concerns and we want to learn from you. And it is beautiful to feel that way about each other."
