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Alstadhaug Church was built in the 12th century and consists of a rectangular nave and a narrower, lower choir at the right end. In the 13th century, the choir received an octagonal extension to the east and, in the late Middle Ages, a sacristy on the north side of the choir. In the 17th century, the church received a baptistery on the west side of the nave and in 1788 a turret with a pointed roof. In the cemetery to the north of the church is one of Norway's largest burial mounds, which gave the place its name.

The Alstahaug Church is a long church with a narrower choir, built in soapstone around 1100-1200. The church is in Romanesque style with solid masonry and semicircular arches. Petter Dass was a priest in Alstahaug and lived in the presbytery from 1689 until his death in 1707. The church was rebuilt and enlarged in 1865. In the 1960s, the church was restored to a medieval style with smaller windows and steeper roof angles.

Alsvåg Church is a long wooden church consecrated as a house of prayer on 7 October 1923 and restored and converted into a church in 1949. The height of the building was increased by half a metre and the windows were changed from rectangular to pointed arches. The interior of the church was restored in 2009.

The Alta church is a long church from 1858. The church was built in wood by the architect Stephen Henry Thomas. In the final phase of the Second World War the church was severely damaged and it was not until Christmas Eve 1945 that it could be reused. It has since been modified several times, most recently in 2005-2006.

The Cathedral of Altamura was built by Emperor Frederick II (1220-1250) in 1232 and became one of the most venerated sanctuaries in Puglia. In 1248, under pressure from Emperor Frederick, Pope Innocent IV declared Altamura exempt from the jurisdiction of the Bishop of Bari, making it a Palatine Church, one of the four in Puglia. The current orientation of the church is the opposite of the original, although it is not known whether the change dates back to the reign of Robert of Anjou (early 14th century) or to the enlargement carried out in 1521-1547. From the 18th century onwards, the upper parts of the two bell towers and the small gallery separating them were added. Since 1986, the church has been the seat of the Bishop of Altamura-Gravina-Acquaviva delle Fonti.

The 13th century Romanesque basilica went through numerous transformations throughout its history: the original apse was replaced by the current Gothic polygonal chancel, the southern aisle received a Baroque vault, the central nave was covered with a late Gothic lierne vault in the 15th century. In the 19th century the bell tower with parapet walk was replaced by the current new Gothic one, built in the same time as the sacristy. The oval curtain wall was reinforced with an outer bailey and four defence towers located in the four cardinal points. The northern tower collapsed at the beginning of the 20th century and parts of the ring wall and storage rooms were demolished.

The Alte Nikolaikirche is a Protestant church. The current late Gothic building was built in the 15th century.

Altenberg Cathedral was founded in the 13th century as an abbey church by the Cistercians. The church, including its interior, is strictly Gothic in style. During secularization (1803) the abbey was dissolved, and parts of the abbey later became a chemical factory. An explosion largely destroyed the abbey buildings in 1815. After the ruins of the church were donated to the Prussian state, Frederick William III (1797 -1840) gave substantial support for the restoration of the abbey church on condition that it be used as a common church. The first Protestant service took place on 13 August 1857. Further phases of restoration took place from 1894 to 1912 and in the 1960s.

Altfriedland Abbey is a former Cistercian abbey founded in the 13th century. Apart from the ruins of the refectory and the remains of a cloister, the nave is the only remaining building of the monastery, which was secularised in the 1540s as part of the Reformation.

Altun-Alem Mosque is a 16th-century Muslim temple in Novi Pazar. It is one of the oldest Islamic buildings in Serbia. Its name means "Golden Gem". It has a square shape with an entrance porch topped with two small domes.