The municipality is composed of 18 parishes, and is the capital of the District of Beja. The present Mayor is Francisco Santos, elected by the Unitarian Democratic Coalition. The municipal holiday is Ascension Day. The Portuguese Air Force has an airbase in the area - the Air Base No. 11.
Situated on a hill (277 m), commanding a strategic position over the vast plains of the Baixo Alentejo, Beja was already an important place in the antiquity. Already inhabited in Celtic times, the town was later named Pax Julia by Julius Caesar in 48 BCE, when he made peace with the Lusitanians. He raised the town to capital of the southernmost province of Lusitania Santarém and Braga were the other capitals of the conventi). During the reign of emperor Augustus the thriving town became "Pax Augusta". It was already then a strategic road junction.
When the Visigoths took over the region, the town, then called Paca, became the seat of a bishopry. Saint Aprígio (died in 530) became the first Visigothic bishop of Paca. The town fell to the invading Omayyad army in 713.
Starting in 910 there were successive attempts of conquest and reconquest by the Christian kings. With the collapse of the Umayyad Caliphate of Córdoba in 1031, Beja became a taifa, an independent Muslim-ruled principality. In 1144 the governor of Beja (باجة الزيت), Sidray ibn Wazir, helped the rebellion of the Muridun (disciples) led by Abul-Qasim Ahmad ibn al-Husayn al-Quasi in the Algarve against power of Seville. In 1150 the town was captured by an army of the Almohads, who annexed it to their North-African empire. It was retaken in 1162 by Fernão Gonçalves, leading the army of the Portuguese king Afonso I. In 1175 Beja was recaptured again by the Almohads. It stayed under Muslim rule till 1234 when king Sancho II finally recaptured the town from the Moors.
All these wars depopulated the town and gradually reduced it into rubble. Only with D. Manuel I in 1521 Beja reached again the status of city. It was attacked and occupied by the Portuguese and the Spanish armies during the Portuguese Restoration War (1640-1667).
Beja became again the head of a bishopry in 1770, more than a thousand years after the fall of the Visigothic city. In 1808 Napoleonic troops under General Junot sacked the city and massacred the inhabitants.
The castle on top of the hill can be seen from afar and dominates the town. It was built, together with the town walls, under the reign of king Diniz in the 13th century over the remains of a Roman castellum that had been fortified by the Moors. It consists of battlemented walls with four square corner towers and a central granite and marble keep (Torre de Menagem), with its height of 40 m the highest in Portugal. The top of the keep can be accessed via a spiral staircase with 197 steps, passing three stellar-vaulted rooms with Gothic windows. The merlons of the machicolation around the keep are topped with small pyramids. Standing on the battlements, one has a sensational panorama over the surrounding landscape. One can also glimpse the remains of the city walls that once had forty turrets and five gates. The castle now houses a small military museum.
The square in front of the castle is named after Gonçalo Mendes da Maia or o Lidador, a brave soldier killed in the battle against the Moors.
It is an impressive building with a late-Gothic lattice-worked architrave running along the building. This elegant architrave resembles somewhat the architrave of the Monastery of Batalha, even if there are some early-Manueline influences. Above the entrance porch on the western façade one can see the ajimez window (a mullioned window in Manueline and Moorish style) in the room of the abbess, originating from the demolished palace of the dukes of Beja. The entrance door is embedded under an ogee arch. A square bell-tower and a spire with crockets tower above the complex. The convent has been classified as a national monument.
The entrance hall leads to the sumptuously gilded Baroque chapel, consisting of a single nave under a semi-circular vault. Three altars (one of the 17th century, dedicated to St. John the Evangelist, and two of the 18th century, dedicated to St. Christopher and St. Bento) are decorated with gilded woodwork (talha dourada). The fourth altar, dedicated to St. John the Baptist, was decorated with Florentine mosaics by José Ramalho in 1695.
On the wall are three religious azulejos dating from 1741, depicting scenes from the life of St. John the Baptist
The refectory and the claustro are decorated with exquisite azulejos, some dating from Moorish times, others from the 16th to the 18th centuries.
One enters the chapter house through a Manueline portal from the quadra of St. John the Evangelist. The ribbed vault of this square room was distempered during the renovations of 1727. The walls are covered with Arab-Hispanic azulejos with geometric and vegetal designs that are among the most important ceramic decorations in Portugal. Above the azulejos are some semicircular distempered paintings with religious themes: St. John the Baptist, St. John the Evangelist, St. Christopher, St. Clare and St. Francis of Assisi.
The museum houses also an important collection of Flemish, Spanish and Portuguese paintings from the 15th to the 18th centuries, among them:
The museum houses also the funeral monuments in late-Gothic style of the first abbess D. Uganda and of the Infante Fernando, Duke of Viseu and his wife Beatriz of Portugal.
The archaeological collection of Fernando Nunes Ribeiro, donated to museum in 1987 after forty years of archaeological research, is on display on the upper floors: Visigothic and Roman artefacts, gravestones from the Bronze Age with antique writings of the Iberians and steles from the Iron Age.
Among the several other artefacts in its collection, the museum possesses the Escudela de Pero de Faria, a unique piece of Chinese porcelain from 1541.
The love affair of Mariana Alcoforado, a 17th c. nun from the convent of the Poor Ladies, with the French officer Noël Bouton, Marquis de Chamilly and later Marshall of France, has made Beja famous in (mainly Portuguese and French) literary circles. Looking from her window, the janella de Mertola, she saw the young officer only once in 1641, while he was campaigning against the Spanish army in the Alentejo. She fell in love at once and wrote him five passionate letters. The Portuguese version of these letters don't exist anymore. They were "translated" into French and published in Brussels in 1669 and soon in several other languages. These lyrical letters full of absolute passion, hope, pleas and despair were an instant success. In the same year the original publisher, Claude Barbin, published a sequel, again written by a Portuguese "lady of society" with seven new letters added to the original five. Later, several hack writers wrote serial stories on the same theme. The interest in the se Portuguese love letters was so strong in the 17th century, that the word "portugaise" became synonymous for "passionate love letter". Even in recent years these letters have been transformed into a stage play "Cartas". It was performed in New York in the Bleecker Theatre’s Culture Project in 2001.