The Burgos Cathedral construction began in 1221 and was completed in 1567. It is a comprehensive example of the evolution of Gothic style, with the entire history of Gothic art exhibited in its superb architecture and unique collection of art, including paintings, choir stalls, reredos, tombs, and stained-glass windows.
The plan of the Cathedral is based on a Latin Cross of harmonious proportions of 84 by 59 metres. The three-story elevation, the vaulting, and the tracery of the windows are closely related to contemporary models of the north of France. The portals of the transept may also be compared to the great sculpted ensembles of the French royal domain, while the enamelled, brass tomb of Bishop Mauricio resembles the so-called Limoges goldsmith work. Undertaken after the Cathedral, the two-storied cloister, which was completed towards 1280, still fits within the framework of the French high Gothic.
After a hiatus of nearly 200 years, work resumed on the Burgos Cathedral towards the middle of the 15th century and continued for more than 100 years. The work done during this time consisted of embellishments of great splendour, assuring the Cathedral’s continued world-renown status. Two architects, Juan de Vallejo and Juan de Castañeda, completed the prodigious cupola with its starred vaulting in 1567, the Burgos Cathedral unified one of the greatest known concentrations of late Gothic masterpieces: the Puerta de la Pellejería (1516) of Francisco de Colonia, the ornamental grill and choir stalls, the grill of the chapel of the Presentation (1519), the retable of Gil de Siloe in the Constable's chapel, the retable of Gil de Siloe and Diego de la Cruz in Saint Anne's chapel, the staircase of Diego de Siloe in the north transept arm (1519), the tombs of Bishop Alonso de Cartagena, Bishop Alonso Luis Osorio de Acuña, the Abbot Juan Ortega de Velasco, the Constable Pedro Hernández de Velasco and, his wife Doña Mencía de Mendoza, etc.
Thereafter, the cathedral continued to be a monument favoured by the arts: the Renaissance retable of the Capilla Mayor by Rodrigo and Martin de la Haya, Domingo de Berriz, and Juan de Anchieta (1562-1580), the tomb of Enrique de Peralta y Cardenas in the chapel of Saint Mary, the chapel of Santa Tecla, and the 'trascoro' of the 18th century.
The cathedral was declared a World Heritage Site by UNESCO on October 31, 1984. It is the only Spanish cathedral that has this distinction independently.
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.