The Stone Bridge across the Otava River is the most significant monument of Písek. It was built in the second half of the 13th century and it is the second oldest stone bridge north of the Alps after the one in Bavarian Regensburg. The bridge is 111 m long and 6.3 m wide. For the period of the construction, the river was likely diverted towards the surrounding meadows and the original riverbed deepened. People mixed broken chicken eggs into the mortar for better cohesion of the granite blocks and the upper stones were connected with lead. There used to be dojons on both sides of the bridge, on the right bank it was connected by a drawbridge with the Prague Gate in the ramparts. Since the 18th century the bridge has been decorated with Baroque statues of St. Ann, St. Anthony of Padua, St. John of Nepomuk and the Calvary with Christ, the Virgin Mary, St. John and St. Mary Magdalene.