Located on a rise of about 70 meters, west of the monastery, Alcobaça Castle was commissioned by King Afonso Henriques in 1147, on the presumed ruins of a 6th-century fortification. Destroyed several times during the Reconquista, King Sancho ordered its reconstruction to shelter the Alcobaça monks and the population in case of attack. After suffering several seismic shocks, it ended up serving as a prison during the reign of the Philips.

The Santarém City Council currently occupies this beautiful palace, a remarkable example of sunny 17th-century civil architecture. The property was acquired in 1954 from the heirs of the capitalist Eugénio de Carvalho e Silva, after whom it is named. A building with classical lines, it has an elegant and sober façade, with balcony windows and characteristic 18th-century moldings. Inside, highlights include the "Noble Hall" and the "Hall of Virtues of the Councilors" with 18th-century tile panels.

Located near the city's courthouse, this 1930s building stands out for its interesting and extensive collection of tile panels. In total, there are 55 figurative panels, along with eight decorative ones made in the old Sacavém Factory, featuring tourist and regional promotional motifs. The building, which has a distinct architectural style, was built on the site where the old open-air market was held for centuries, in what was known as Praça Velha.

Also known as the Fig Tree Fountain or Moorish Fountain, it is an interesting example of Gothic civil architecture, illustrative of public works from the 13th and 14th centuries. This national monument has a porch structure resting on three arches and is characterized by the decoration of its crowning with pointed battlements. The vault features shields with the royal arms, which appear to be those of King Dinis, and those of the municipality, these being of great perfection with intertwined floral decoration.

A national monument of Gothic origin, it was rebuilt in 1600 in the Mannerist style after a fire destroyed the original structure. Inside, the Manueline tomb of João Afonso, founder of the city's old hospital, and the Gothic tomb of Fernão Rodrigues Redondo are also classified as national monuments. Also noteworthy are the two paintings by Bento Coelho da Silveira. The church, which includes the Chapel of St. Peter, has a 19th-century pipe organ.

The historic center of Santarém is a veritable open-air museum. Strolling through this urban area, you can admire around 25 listed buildings that reflect different architectural styles, ranging from Gothic to Mannerist. These testimonies of past eras reflect well the importance the city has held throughout its rich and extensive history, largely derived from its geographical location, which was seen as strategic, on the right bank of the Tagus River.

It is, in fact, the Clock Tower of Santarém and was erected in the 15th century on top of a tower within the walled enclosure of the old medieval town. It is one of the city's best-known buildings, and its popular name, Torre das Cabaças (Tower of the Gourds), comes from the clay gourds used to amplify the sound of the imposing bronze bell dating from 1604. From its 26-meter height, it is possible to see the city's urban layout and the surrounding fields. Currently, it houses the Time Museum.

Anyone traveling from the neighboring municipality of Almeirim to Santarém via the Don Luís Bridge, which crosses the Tagus River, will find the walls of the Ribatejo capital before them. However, little remains of Santarém's imposing and ancient fortifications, although in the Jardim das Portas do Sol, which sits atop the walls, it is still possible to find three turrets. Several sections of walls and a stretch of the Porta de Santiago are other vestiges of what was once an important medieval castle.

Located 25 kilometers from the town center is this monument of probable Arab origin. Rebuilt after the 1531 earthquake, it features an interesting sculpture above the main gate, where three castles and an eagle are visible. After assuming great defensive importance, it lost its usefulness over the years, and only between 1941 and 1954 did it undergo renovations that gave it its current appearance, with two towers. It served as a prison during the Middle Ages.

A national monument that stands out for its grandeur and architectural beauty. Dedicated to Our Lady of the Conception, it is believed to have been built between 1672 and 1711 by the Society of Jesus, later becoming the Patriarchal Seminary. It features a Mannerist façade and structure and a Baroque interior, with striking polychrome stone inlays, gilded wood carvings, and paintings on the ceilings of the nave and chancel. It has a 19th-century pipe organ and houses the Diocesan Museum.