Among small-dome planetariums, the Olbers Planetarium is one of the oldest. When it was inaugurated in 1952, it used a Carl Zeiss projector built already before 1945 for astronomical navigation training. In 1979 it was replaced with a ZKP 2, which has been an untiring workhorse since. Star navigation having declined in importance, the Bremen Planetarium today is focused on school astronomy and a wide variety of public shows. The star projector has been supplemented by multimedia technology.