Is it permissible for the people of Ahlul Kitãb and other non-Muslims to enter the mosques (masjid) and other Islamic places of worship [like husayniyya or imambargah which are not masjid]? And is it necessarily for us to enforce the hijãb on those [non-Muslim women] who do not observe hijãb and allow them to enter [the mosque or places of worship], if it is permissible?
Answer
Based on obligatory precaution, it is not permissible for them [i.e., non-Muslims] to enter the mosque (masjid). As for their entering the places of worship, etc, there is no problem in it. If their entry [in imambargah or a husayniyya or a center] without hijãb is considered as a sign of disrespect, hijãb should be enforced on the [non-Muslim] women.