Opened in early 2014, this modern culture complex symbolically connects Poznań's two oldest districts - Ostrów Tumski and Śródka - via a covered 'skywalk' bridge between the main exhibition building and the Cathedral Lock - a restored section of the former Prussian river fortifications. The main building is actually on the Śródka side of the Cybina River, and presents the fascinating history of the area from medieval times to the modern day, with some rather dogmatic content, via a rather gimmicky combo of audioguide and interactive multimedia displays.
 

The touring route concludes by leading visitors across the 'skywalk' straight into Ostrów Tumski itself (no ticket required), making this the ideal starting point for exploring the district. Audioguides, not just for Porta Posnania, but all of Ostrów Tumski, are included in the ticket price (or separately for 11/8zł) and available in English, German, French, Spanish, Czech, Russian, and Ukrainian; there are three specially-designed audiotour routes - one for individuals, one for groups, and one for families - to make sure everyone gets the most out of it, especially kids. Topping it off is a souvenir shop and a lovely rooftop terrace (open during the warm season only; ticket required) that offers unique views of Poznań Cathedral and the surrounding area.

Visiting time: approx. 100mins.