A mosque which was erected 100 years ago, was removed and rebuilt again by
citizens who donated their money on the basis that the structure was to be used solely as a mosque. Prayers were offered for an entire year on the ground floor after which an upper floor was built. One of those in charge of the mosque designated the ground floor as a reception hall and the upper floor as a mosque. Please bear in mind that the ground floor is used as a reception hall only as needed. In the absence of any reservations, it is refurnished as a mosque.
Is it permissible to convert the ground floor into a reception hall in this manner?