The Diocesan Museum in Pelplin (Polish: Muzeum Diecezjalne w Pelplinie) holds one of the finest collections of medieval art in Poland.

It bears the name of Bishop Stanisław Wojciech Okoniewski (1870–1944), the founder of the museum (pl), who died in Lisbon during World War II.

[2] The museum received generous financial support from the Ministry of Culture and National Heritage for the preventive conservation of paintings from 1420 to 1695.

[3] The Gutenberg Bible (pictured below) held by the museum,[4] originally from the Franciscan monastery in Lubawa, is one of only 48 copies which survived to modern times.

[8] The museum collections of early prints include the priceless manuscript of St. Augustine of Hippo from 425 titled "De civitate Dei".