The Royal Archcathedral Basilica of Saints Stanislaus and Wenceslaus is a Roman Catholic church located on Wawel Castle hill. More than 900 years old, it is the Polish national sanctuary and traditionally has served as coronation site of the Polish monarchs as well as the Cathedral of the Archdiocese of Kraków. The current, Gothic cathedral, is the third edifice on this site: the first was constructed and destroyed in the 11th century; the second one, constructed in the 12th century, was destroyed by a fire in 1305. The construction of the current one began in the 14th century on the orders of bishop Nanker.
The Cathedral comprises a nave with aisles, transepts with aisles, a choir with double aisles, and an apse with ambulatory and radiating chapels. The main altar, located in the apse, was founded about 1650 by Bishop Piotr Gembicki and created by Giovanni Battista Gisleni. The altar painting of Crucified Christ by Marcin Blechowski is from the 17th century. Over the main altar stands a tall canopy of black marble supported by four pillars, designed by Giovanni Battista Trevano and Matteo Castelli between 1626 and 1629. Underneath the canopy is placed a silver coffin of national patron saint St. Stanislaus (Stanisław) created between 1669-1671 after the previous one (donated in 1512 by King Sigismund I the Old) was stolen by the Swedes in 1655.
The Wawel Cathedral has been the main burial site for Polish monarchs since the 14th century. As such, it has been significantly extended and altered over time as individual rulers have added multiple burial chapels.
Sigismund's Chapel, adjoining the southern wall of the cathedral, is one of the most notable pieces of architecture in Kraków and a pure example of Renaissance architecture outside Italy. Financed by Sigismund I the Old, it was built between 1517 and 1533 by Bartolommeo Berrecci, a Florentine Renaissance architect, who spent most of his career in Poland.
A square-based chapel with a golden dome, it houses the tombs of its founder and those his children, King Sigismund II Augustus and Anna Jagiellon (Jagiellonka).
The crypt beneath the Wawel Cathedral holds the tombs of Polish kings, national heroes, generals and revolutionaries.References:
Kristiansten Fortress was built to protect the city against attack from the east. Construction was finished in 1685. General Johan Caspar von Cicignon, who was chief inspector of kuks fortifications, was responsible for the new town plan of Trondheim after the great fire of 18 April 1681. He also made the plans for the construction of Kristiansten Fortress.
The fortress was built during the period from 1682 to 1684 and strengthened to a complete defence fortification in 1691 by building an advanced post Kristiandsands bastion in the east and in 1695 with the now vanished Møllenberg skanse by the river Nidelven. These fortifications were encircled by a continuous palisade and thereby connected to the fortified city. In 1750 the fortress was modernized with new bastions and casemates to protect against mortar artillery.