The village is articulated in three district urban nuclei that include: il Castello (fortress), il Peschio, La Valle, contained in long town-walls still well preserved here and there.
The Palazzo Ducale (or Palazzo Gallio, Ducal Palace), built in Renaissance style by Tolomeo Gallio in the late 16th-early 17th centuries, is located on the main road of La Valle Suburb, constituting the true nucleus of the present village. On the same road are other important buildings (Palazzo Sipari, Palazzo Graziani) of the 19th century. A little bit forward, on the left hand, a short small road goes uphill to the Church of S. Teresa, in a baroque style, with a high portal.
The main parish church, San Simeone (16th century), is located in La Valle near the Palazzo Sipari. The church has a Romanesque bell tower and an 18th-century interior. From the church, passing through a Gothic gate, is a stairway leading to the deconsecrated monastery of San Nicolas, a former Franciscan institution. The monastery was nearly destroyed by the earthquake in 1915, restored in 1934: it has maintained the chorus and the inlaid cupboards of the 18th century, ordered by Pope Clement XIV.