Fenced off from the southern end of sketchy Joubert Park is this elegant Lutyens-designed gallery dating from 1915. The JAG has one of the largest art collections in Africa; however, only a tiny fraction of it is ever on display and usually the gallery rooms that are open host temporary exhibitions. The entrance is just off Klein St.
There's a decent shop with some nice arty gifts and books for sale.
The area around here has a very lively street market but keep your wits about you as you stroll through. Joubert Park itself is best avoided.