Of the six original towers on the walls of Avis Castle, only three have survived, one of which is Saint Roque. The other two towers are Saint Anthony and the Queen.

This eighteenth-century church, with an attached hospital, is in good condition. It features a single nave, sacristy, and chancel. The main altarpiece is neoclassical in style, made of pink and gray Estremoz marble.

The church was founded on an uncertain date, but it is known that it was rebuilt in the mid-17th century. Its appearance maintains its medieval design. The church has a simple portico, crowned by a pediment bearing the national coat of arms. The Renaissance-style chancel was built in 1694, with the rest of the church being Baroque. The convent houses the famous silver-inlaid reliquary of Saints Peter and Paul, a work of 15th-century goldsmithing.

Built in the 13th century, the castle was rebuilt in the 15th and 16th centuries by Fernão Anes, master of the Military Order of Aviz. Of the castle's six towers, only three and a few sections of the wall remain, adapted for modern construction. Highlights include the Queen's Tower or Convent Tower, the Tower of Santo António, and the Tower of São Roque.

Temple of seventeenth-century style with Baroque elements in the decoration.

It has a small base where it settles a square shaft finished by a capital with acanthus leaves. Above it there is a halfspheric urn with four frowns and four gargoyles and on the top an Eagle with open wings.