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."
