ostrow tumski island over odra river with st. john baptist cathedral in historic old town quarter of wroclaw in poland

architecture attraction baptist cathedral chciciel christian church city cityscape collegiate cross destination evening facade gothic heritage historic history island jan john katedra kolegiata kosciol landmark marcin martin museum odra old ostrow panorama panoramic picturesque poland polish polska river silesia slask slaskie staromiejski summer sunset tourism touristic tower travel tumski vacation wroclaw wroclove wyspa