Sayed al-Hashim Mosque - Credit: Wikimedia Commons
The Sayed al-Hashim Mosque ( Masjid as-Sayed Hāshim; ) is one of the largest and oldest mosques in Gaza, located in the ad-Darrāj Quarter of the Old City, off of al-Wehda Street. The tomb of Hashim ibn Abd al-Manaf, Muhammad's great grandfather who died in Gaza during a trading voyage, is located under the dome of the mosque according to Muslim tradition. Read more on Wikipedia
Source: en.wikipedia.org