Time Out says
Municipium is set in a grand Habsburg-era building, tucked away in a quiet courtyard right in the centre of town. Door staff greet you at the entrance, but don't worry, this provides a very informal dining experience, down to the days' menu chalked up on a board. This menu is usually fish-oriented, reasonably priced considering the quality of service, presentation and the fare itself. The wine list runs to scores of (mainly Croatian) varieties, a decent number available by the glass. Note also the cut-price lunch specials, marende.