The Collegiate Church of St. Florian was built between 1185 and 1216. It was burnt down many times in the 12th, 16th and 17th centuries. Notably, during the Swedish siege of Kraków, General Stefan Czarniecki ordered the city's suburbs burned down. However, during the city-wide fire which consumed a considerable part of Kraków in 1528, the church – containing St. Florian's relics – survived. Since then St. Florian, usually portrayed as a Roman legion officer carrying water, has been revered in Poland as patron saint of firefighters and chimneysweeps. The church's present appearance is the result of a Baroque renovation after the Polish-Swedish wars.
Since the 16th century the Church has been the University Collegiate. The coronation route began there, with the rector of the university senate welcoming new kings. The Church was also the starting point for royal funeral processions to Wawel Cathedral.
In 1667 the remains of Queen Ludwika Maria Gonzaga, wife of King Jan II Kazimierz, were placed there temporarily, and in 1818 the remains of Tadeusz Kościuszko were placed there. From 17 September 1949 to September 1951, Father Karol Wojtyła, who later became Pope John Paul II, worked there as a vicar. As Pope, in 1999 he elevated the Church to a minor basilica.
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.