Castle founded by Dom Dinis in 1290, deployed in the most Uptown. Originally, had a double wall with twelve towers and eight gates. This unique construction, only a few walls and panels of three towers.

These walls with two doors were originally built on the 13th century. Later, on the 17th century, it was built the fortress with bastions from Portalegre enclosure.

The first cloister consists of a vast landscaped quad. The Center, a granite font dated to the 17th century.The two-storey cloister has four double arches on each side, separated outwardly by foothills monumental equipped. The second cloister is identical configuration, although smaller. The vaults of the cloisters have molded ribbing, based on cylindrical Corbels worked.

Convent built in 1376 the Queen Dona Leonor Teles. Features mainly Gothic features, but also some Baroque and Renaissance details. Suffered renovations in the centuries XVI, XVIII and XX. Currently, works here the Municipal Library.

This house was build in the middle of the 17th century; it suffered several transformations through the 18th and 19th centuries. From the original construction it only remains eleven windows in forged iron railings. The main door and the window on top of it are form the 18th century. On the building corners it can be observed the Coat of Arms from the families who lived here. We should also bring out the square and cornered tower with matting roof and four windows from the 19th century.

Castle located in a border area that was the scene of many campaigns warriors. Amuralhamento construction of the fence, reinforced by towers semicilíndricas, due to a deal between the people of Alegrete and King Dinis: residents built the wall and the monarch would grant a Charter. Dinis, in addition to repopulate the village, built the Tower of homage, and in 1319, continued the work begun by his father, Dom Afonso III. At the front gate of the old fence, the clock of the old village.

The primitive Church completed in 1389, nothing remains. In the 15th and 16th centuries were modified the cloisters and other dependencies, having undergone too many changes in the 18th century. The 18TH century former convent survives, currently a part of the cloister floor.

This temple was constructed in 1530 and it suffered several transformations especially during the 18th century. From the original outline it kept the giants sustaining the main chapel. It presents a portico with round arch with cherubim. On the inside it is possible to see Dom Jorge Melo tomb dating from 1540, one of the most sumptuous in Portugal.

Established in the 16th century this renaissance style construction underwent several modifications during the 18th century, especially on the outside. On the inside, there are 17th century tile panels and an outstanding collection of Mannerist paintings, unique of this kind in Portugal. More that ninety paintings make up the retables on the main altar and lateral chapels. Inside the Cathedral it is also possible to see the sacristy and the cloister which was completed in the 18th century.

The Sanctuary of Nossa Senhora da Penha is a Baroque chapel dated from the 17th century composed with one only nave, a main chapel and a campanile. On the inside the frescoes have to be pointed out.