St. John's Archcathedral in Warsaw stands immediately adjacent to Warsaw's Jesuit church, and is one of the oldest churches in the city. St. John's Archcathedral is one of Poland's national pantheons. Along with the city, the church has been listed by UNESCO as of cultural significance.
Originally built in the 14th century in Masovian Gothic style, the Cathedral served as a coronation and burial site for numerous Dukes of Masovia. The Archcathedral was connected with the Royal Castle by an elevated 80-meter-long corridor that had been built by Queen Anna Jagiellonka in the late 16th century and extended in the 1620s after Michał Piekarski's failed 1620 attempt to assassinate King of Poland Sigismund III in front of the Cathedral.
After the resolution of the Constitution of May 3, 1791, at the end of the session at the Royal Castle, King Stanisław August Poniatowski went to the Cathedral of St. John to repeat the Oath of the Constitution in front of the Altar, in the face of God. Also the Marshals of the Great Sejm were carried to the Archcathedral on the shoulders of the enthusiastic deputies of the Sejm.
The church was rebuilt several times, most notably in the 19th century, it was preserved until World War II as an example of English Gothic Revival.
In 1944, during the Warsaw Uprising the Cathedral was a place of struggle between insurgents and advancing German army. The Germans managed to induct a tank loaded with explosives into the Cathedral, a huge explosion destroyed large part of the building. After the collapse of the Uprising, German Vernichtungskommando (Destruction Detachment) drilled holes into the walls for explosives and blew up the Cathedral destroying 90% of its walls.
Leveled during the Warsaw Uprising (August–October 1944), it was rebuilt after the war. The exterior reconstruction is based on the 14th-century church's presumed appearance (according to an early-17th-century Hogenberg illustration and a 1627 Abraham Boot drawing), not on its prewar appearance.
The interior reconstruction design considerably differed from the pre-war Cathedral, taking it back in time to its raw Gothic look, because very little of the cathedral's original furnishings has been preserved. The Cathedral is a three-nave building, two aisles are the same height as the main nave. On the right side from the front a belfry is situated, a passage to Dziekania Street is situated underneath it. There is a pulpit from 1959, designed by Józef Trenarowski and stalls which are a replica of the destroyed baroque ones, founded by King John III Sobieski. Moreover, there are many chapels, gravestones and epitaphs in the Cathedral. By the left aisle are numerous chapels. They are, in turn, from the main altar:
The crypts beneath the main aisle hold the remains of notable persons, including Dukes of Masovia and King Stanisław August Poniatowski, the last Polish monarch.
References:Rosenborg Palace was built in the period 1606-34 as Christian IV’s summerhouse just outside the ramparts of Copenhagen. Christian IV was very fond of the palace and often stayed at the castle when he resided in Copenhagen, and it was here that he died in 1648. After his death, the palace passed to his son King Frederik III, who together with his queen, Sophie Amalie, carried out several types of modernisation.
The last king who used the place as a residence was Frederik IV, and around 1720, Rosenborg was abandoned in favor of Frederiksborg Palace.Through the 1700s, considerable art treasures were collected at Rosenborg Castle, among other things items from the estates of deceased royalty and from Christiansborg after the fire there in 1794.
Soon the idea of a museum arose, and that was realised in 1833, which is The Royal Danish Collection’s official year of establishment.