Rising out on a rocky crag above the confluence of two rivers near the Guadarrama mountains, the Alcázar of Segovia is one of the most distinctive castle-palaces in Spain by virtue of its shape – like the bow of a ship. The Alcázar was originally built as a fortress but has served as a royal palace, a state prison, a Royal Artillery College and a military academy since then. It is currently used as a museum and a military archives building.
The Alcázar, like many fortifications in Spain, started off as Roman fort, but apart from the foundations, little of the original structure remains. A Muslim era fort, which was itself largely replaced by the present structure, was built by the Berber Almoravid dynasty. The first reference to this particular "alcázar" was in 1120, around 32 years after the city of Segovia returned to Christian hands. It can be concluded that prior to Alfonso VIII's reign, the Muslim era structure was no more than a wooden fort built over the old Roman foundations. Alfonso VIII and his wife, Eleanor of England, made this alcázar their principal residence and much work was carried out to erect the beginnings of the stone fortification we see today.
The Alcázar of Segovia was one of the favorite residences of the monarchs of Castile in the Middle Ages, and a key fortress in the defence of the kingdom. It was during this period that most of the current building was constructed by the Trastámara dynasty.
In 1258, parts of the Alcázar had to be rebuilt by King Alfonso X after a cave-in and the Hall of Kings was built to house Parliament soon after. However, the single largest contributor to the continuing construction of the Alcázar is King John II who built the "New Tower" (John II tower as it is known today).
The next major renovation at the Alcázar was conducted by King Philip II after his marriage to Anna of Austria. He added the sharp slate spires to reflect the castles of central Europe. In 1587, architect Francisco de Morar completed the main garden and the School of Honor areas of the castle.
The Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.