The beginnings of the Nossa Senhora da Oliveira Church date back to the monastery dedicated to the Saviour of the World, the Blessed Virgin Mary and the Holy Apostles, which was founded at this location by the Countess Mumadona Dias in the year 949 AD. Little remains of the original construction although a Romanesque chancel dating from the second half of the twelfth century and originating from the main church portal is preserved in the Alberto Sampaio Museum.
The arches of the cloister and the portal of the Chapter Hall, a work of excellent constructive technique, are testimony to Portugal's finest Romanesque-Mudéjar ensemble.
The invocation of Our Lady of Oliveira arose after 1342, with the greening of an olive tree in the border square, although the area was already an important pilgrimage hub to venerate an image of Santa Maria - the same one that was worshipped by D. João I on the eve of the Battle of Aljubarrota. Having won the battle, and in fulfilment of the King’s promise, the building was remodelled. Work continued until at least 1413, becoming a landmark of Gothic architecture in northern Portugal. The large window in the upper half of the main facade is integrally dedicated to the genealogy of the Virgin. In the altarpiece of the main chapel is an ancient image of Our Lady of Oliveira.
The building also includes Manueline elements, especially the bell tower, which was rebuilt by the Prior D. Diogo Pinheiro in 1513, and in which is the Burial Chapel of his parents. At the end of the 17th century, King Peter II ordered the main chapel to be enlarged, his coat of arms can be seen in the vault; from the same period is the 17th-century chancel with neoclassical backrests, another of the monument’s highlights, along with the altarpiece of the High Altar (dating from the second half of the 18th century), the silver altar of the Chapel of the Blessed Sacrament, and the large baroque canvases, attributed to Pedro Alexandrino, that adorn the walls. The building underwent modifications in the 19th and 20th centuries.In 1801, against the will of the population, the local council dug up an olive tree that had for years occupied the space in front of the church.
References:Celje Castle was once the largest fortification on Slovenian territory. The first fortified building on the site (a Romanesque palace) was built in the first half of the 13th century by the Counts of Heunburg from Carinthia on the stony outcrop on the western side of the ridge where the castle stands. It had five sides, or four plus the southern side, which was a natural defence. The first written records of the castle date back to between 1125 and 1137; it was probably built by Count Gunter. In the western section of the castle, there was a building with several floors. Remains of the walls of this palatium have survived. In the eastern section, there was an enclosed courtyard with large water reservoirs. The eastern wall, which protects the castle from its most exposed side, was around three metres thicker than the rest of the curtain wall. The wall was topped with a parapet and protected walkway.