The designation of the oldest mosque of the world requires a careful use of definitions, and must into two parts be divided, the oldest in the sense of the oldest received buildings and the oldest in the sense of the oldest mosque municipality. There is the distinction between old mosque also here building, those been in continous use as mosques its, and those, those for other purposes converted and between buildings, those in continous use than mosques became and such, the window shops were for many decades. Regarding the municipalities, they were between beginning of established municipalities, those in continuous existence, and early municipalities to differentiate to exist (Wikipedia) stopped.