The Old City of Jerusalem is small. It covers just under one square kilometre.
The walls that stand today were built in the 16th century under the Ottoman sultan Suleiman. You enter through seven gates. Inside are four quarters: the Muslim, the Christian, the Armenian and the Jewish.
In the south-east corner lies the al-Aqsa compound with the Dome of the Rock. It was built under the caliph Abd al-Malik at the end of the 7th century and is one of the oldest Islamic buildings still standing. Al-Aqsa is the third holiest site in Islam.
Since 1981 the Old City and its walls have been a UNESCO World Heritage Site. The following year it was placed on the List of World Heritage in Danger, and it is still there.
That is the city in the painting on the Jerusalem Hoodie.
Sources: Wikipedia, Old City of Jerusalem and UNESCO, Old City of Jerusalem and its Walls.
The picture: the Dome of the Rock from the north-east, photographed some time between 1898 and 1946. Photo from the Matson Collection, Library of Congress (matpc 07488). No known restrictions on publication.