Founded in the 13th century, the Order of the Knights of the Cross with the Red Star were the guardians of Judith Bridge (and its successor, Charles Bridge), with their 鈥榤other house鈥 at the Church of St Francis Seraphinus on K艡铆啪ovnick茅 n谩m臎st铆. This museum, housed in the order鈥檚 headquarters, covers the history of Prague鈥檚 most famous landmark.
There are displays on ancient bridge-building techniques, masonry and carpentry, and models of both the Judith and Charles Bridges. In room 16 you can descend into the foundations of the building to see some of the original stonework of Judith Bridge (dating from 1172), but perhaps the most impressive exhibits are the old photographs of flood damage to Charles Bridge in 1890, when three arches collapsed and were swept away.