The Broerekerk was built as part of a Franciscan monastery founded in 1270. The church was built in two phases, starting in 1281, and was probably completed in 1313, which makes it the oldest building in Bolsward. It's a three-aisled pseudo-basilica in simple Gothic style. On the north side the gable of a pseudo-transept can just be seen. The facade is the richest part of the church, and is decorated with a climbing frieze. In 1980 the roof and the wooden vaults were destroyed by fire.
References:The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.