There is an interesting exhibition in Lindenmuseum that started on the 01.04 about New Zealand's Maoris. Apart from this current event the permanent exhibition is also worth seeing. This ethnology museum concentrates on African, South American Asian and Arabic history, culture and art. It is located not far from Liederhallte/Bosch Areal.
I am going to be there next sunday, the 22nd at 14:00. Anybody interested is welcome to join in.