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Our Lady of Blankedelle Church is a modern style church built between 1968 and 1970. It is a Catholic parish for the Transvaal district. In the second half of the 20th century, a third parish church was needed in Auderghem, in a district that was undergoing a period of urbanisation. The Avenue des Héros, where the church was built, was created in 1955.

The Abbey of Rouge-Cloître was built in 1366 as a hermitage. The priory was then built in 1374, on land granted by the duchess Jeanne de Brabant. In the 16th century, the monastery was one of the most prestigious in the Spanish Netherlands, Charles V often stayed there. However, at the end of the 16th century, during the Dutch revolt (from 1566), the priory was looted and the canons were forced to take refuge in Brussels until the end of the troubles. The monastery was definitively suppressed in 1796 with the suppression of the monasteries decreed by the French Directory.

The Sainte-Anne chapel is part of the Val Duchesse domain although it is older than the Prieuré de Val Duchesse. There is no written record of the date of construction of the Sainte-Anne chapel. It is thought that some parts of this simple Romanesque construction can be dated to the 11th century. The chapel became the property of the municipality in 1796 and has changed hands twelve times since 1812. From 1802 to 1843, it was promoted to the auxiliary parish church of Watermael, but became too small and was replaced by the Church of St. Anne. It was deconsecrated in 1854. It was restored around 1915 under the direction of Canon Lemaire, professor at the Catholic University of Louvain.

The priory of Val Duchesse was a convent of Dominican nuns from the 13th century. It was founded in 1262 by the Duchess Adelaide of Burgundy with the religious community of Val Duchesse. Closed by the revolutionary power in 1796, what remained of it passed into private hands in the 19th century before becoming the property of the Belgian State in 1930. Today, the priory and its grounds are often used for important national or international meetings and colloquia.

St. Clement's Church is a church whose oldest part consists of the main nave and the Romanesque tower, dating back to the 11th century. The building was enlarged in the 15th century with the addition of a transept and a choir in late Gothic style. In 1871, the church was extensively restored and the 15th-century additions were removed and rebuilt in the neo-Romanesque style.

The Chapel of Mary the Miserable is a Brabantine Gothic style building from the 14th century. At the beginning of the 14th century, a villager named Mary had decided to live in seclusion and to renounce the world. One day, she met a rich lord of Brussels who tried to seduce her, but Marie resisted him, so he had her judged for theft, vagrancy and witchcraft. She was condemned to be buried alive. Miracles having occurred at the place of her execution, a pilgrimage developed and the chapel was built.

Notre-Dame-des-Grâces Church, commonly known as the Church of Chant d'Oiseau, was built from 1934 to 1949 by architect Camille Damman. This neo-Romanesque church is part of a convent of Franciscans who also provide pastoral services. The first Franciscan Friars Minor who arrived in Brussels in 1228 built a modest chapel in 1244 to house a statue of the Virgin Mary, called "Notre-Dame du Chant des Oiseaux", nestled in a beech tree in a small wood on the banks of the Senne, outside the city walls.

The church of Sainte-Anne was built in 1912 by the architect Depuits. During the winter of 1944-45, the parish hall served as a refuge for the residents of the Malmedy hospice, victims of the German invasion. In the early 1950s, the church received stained glass windows by Jean Slagmuylder (1901-1968) based on drawings by Margot Weemaes (1909-1993).

The chapel of Boondael, built in the 19th century, is the third chapel built on this site. A first chapel was built in the 15th century as a place of worship for the villagers. The present chapel is a reconstruction of 1842 by the architect Pierre Vandenbranden. Today, the chapel is used for artistic and cultural activities.

The church of Saint Adrien was built from 1938 to 1941, to replace the chapel of Boondael as a place of Catholic worship, it is a parish church for the Catholic community of Ixelles. The church of Saint-Adrien is also a place of worship for the Maronite community (Eastern Catholics of Lebanon). The chapel of Boondael was desecrated and saved from demolition in 1927 by the intervention of the Royal Commission of Monuments and Sites.