The Grand Ayatollah Khamenei answered a question about the rule on the destroyed Mosque.
Question & Answer
Due to the municipal development plan, they were forced to destroy a part of one Mosque. Does the destroyed part still enjoy the status of a Mosque?
Ayatollah Khamenei answered: If there is no possibility of returning it to its original state, the religious rules of the Mosque is not applied to it.
source:shafaqna