The bailey is not as heavily fortified as the keep, but it has several turrets. The Renaissance construction work included heavy modification of nearly all the rooms in the older medieval part of the castle. Since the Renaissance no additions have been made to the castle. The modest military fortification grew into a massive greystone castle, whose solid walls have witnessed many milestones in Nordic history. The castle has been subject to numerous sieges and several battles have been waged aside its walls. Of all Finnish castles, Turku castle has the most warlike history besides Vyborg castle and Olavinlinna. The castle's heyday was in the mid-16th century during the reign of Duke John of Finland and Catherine Jagellon. That was when the Renaissance Floor and King's and Queen's hall were built, along with other features. The castle was the center of the historical province of Finland Proper, and the administrative center of all of Finland. Its strong walls and dungeons also served as the state prison for centuries; even today, a prison is colloquially referred to as "linna" (castle) in Finnish. The castle has been the place of many historical events; in 1573–1579, for example, the deposed Swedish queen  Karin Månsdotter was kept prisoner here. The castle is Finland's most visited museum, with attendance reaching 200,000 in some years. In addition, many of the larger rooms are used for municipal functions. Various castellans, bailiffs, military commanders, governors who held Turku Castle in the Middle Ages:   The Turku Castle is the setting for the fairy tale "The Tomten in Åbo Castle" written by Zachris Topelius in 1849. At the time of writing, Turku Castle was badly damaged, and just like Victor Hugo's "The Hunchback of Notre-Dame" in the case of Notre-Dame de Paris, the story of Topelius had a major influence on the desire to restore this important landmark of Turku. The walls of the castle or the castle itself are also featured in many Finnish films. These include the adventure film "Sadan miekan mies" from 1951 directed by Ilmari Unho and drama film "The Girl King" from 2015 directed by Mika Kaurismäki.