Germany’s largest mosque will for the first time broadcast the call to prayer on Friday after city authorities in Cologne gave the go-ahead for a pilot project, under strict limits. Cologne’s Central Mosque, an imposing building in the western city’s Ehrenfeld district, will be allowed to send out a single call to prayer over loudspeakers for up to five minutes on Fridays, between noon and 3:00 pm. The volume must not exceed 60 decibels. The agreement, part of a two-year pilot project, was to be formally be signed by Cologne officials on Thursday. Mosques in several cities in Germany have long…