De Vischmarktpijp en de Brol te Leeuwarden (Fr.)
In the late medieval period a system of canals was dug in what is now the centre of the town of Leeuwarden. A major part of this canal system still exists today. At several places bridges were built across the canals. The oldest bridges must have been constructed from wood. Their successors were constructed in stone. Two of these bridges, the so-called Vischmarktpijp and Brol, were investigated in 2001 and 2002. These bridges had a tunnel-like shape. The bridge of the Brol consisted of two barrels. Both barrels of the Brol and that of the Vischmarktpijp were built at the beginning of the 17th century, except the western part of the southern barrel of the Brol, which was constructed in the second half of the 16th century.