A village upon the Vistula River with ruins of a defensive castle of the Firlej and the Lubomirski Families from the first half of the 16th c., which was rebuilt into a Mannerist residence by the sculptor and architect Santi Gucci, and later into a Baroque palace by Tylman van Gameren. In the 19th c. the building fell into ruin and was partially reconstructed in the 1970s for the needs of a museum. Next to the castle there is a small folk museum with a manor house from Moniaki and several historic farm buildings from different villages in the Powiśle Region. In the centre of Janowiec there is a Renaissance church with a marble tomb of the Firlej Family sculpted by Santi Gucci.

Church of St. Stanislaus and St. Margaret. The history of this church dates back to the 14th century. Once Gothic, it was reconstructed in the Lublin Renaissance style at the turn of the 17th century. Characteristic gables were added, the barrel vault was decorated with stucco ornaments by Jakub Balin, a renowned architect of Italian origin working in Poland, and a quadrilateral tower adjoining the façade was erected. Among the stucco decorations there are coats of arms of the Dulski and the Tarło family. The Baroque high altar is thought to have been designed by Tylman van Gameren. The late-Baroque side altars were made by the Hoffmann brothers in Puławy. Santi Gucci’s work – manneristic tomb effigies of Andrzej Firlej and his wife Barbara nėe Szreńska from the end of the 16th century - can be seen in the chancel. In the 16th century the church held both Roman Catholic and Protestant services.