The interior of temple has one nave and is decorated in rococo style. Six wooden altars, church ambo, confessionals, pews and balustrade were made by wood-carver Jozef Eglauer. On the left to the nave a garrison chapel was added in 1731. The chapel was founded by a Poznan warrant officer, hussarian colonel – Piotr Sokolnicki. At church entrance lies a slab with an inscription in latin: „Hic iacet peccator 1706", which means „A sinner lies here". In 1914 during city bombing church was partly destroyed. Rebuild in 1919-21, was consecrated by Papal Nuncio Achilles Ratti (later pope Pius XI).