Is it allowed to conduct marriages in the mosques?
It is confirmed through Islamic tradition and history that to conduct the marriage in the mosque is allowed. According to one hadith the Prophet (s) said, “declare the marriage in the masjid.” However what is sometimes done today, where people perform the marriage ceremony (nikah) in the hall of the mosque, and then begin to use drums and celebrate the wedding with men and women mixing, is improper. We may observe wedding traditions only while according full respect to the mosque and to those who are praying in it.
Shaykh Muhammad Hisham Kabbani