The Parc du Cinquantenaire (pronounced [paʁk dy sɛ̃kɑ̃t(ə)nɛːʁ]; French for 'Park of the Fiftieth Anniversary') or Jubelpark (pronounced [ˈjybəlˌpɑr(ə)k]; Dutch for 'Jubilee Park') is a large public, urban park of 30 ha (74 acres) in the easternmost part of the European Quarter in Brussels, Belgium.

The Temple of Human Passions by Victor Horta, a remainder from 1896, the Monument to the Belgian Pioneers in Congo from 1921, and the Great Mosque of Brussels from 1978, are located in the north-western corner of the park (see map below).

Lines 1 and 5 of the Brussels Metro and the Belliard Tunnel from the Rue de la Loi/Wetstraat pass underneath the park, the latter partly in an open section in front of the arch.

Originally, the area now known as the Cinquantenaire/Jubelpark (French/Dutch) was part of the military exercise ground of the Garde Civique outside of Brussels' city centre, the so-called "Linthout" plains.

The location was named Cinquantenaire in French (literally "Fiftieth Anniversary") and Jubelpark in Dutch ("Jubilee Park") because it was planned to celebrate the half-century since Belgian independence in 1830.

Girault changed the design from a single to a triple arch, and began a course of round-the-clock construction in a final push to complete it.

The monument was completed with private funding in May 1905 and the arcade was inaugurated by Leopold II on 27 September 1905, just in time for the 75th anniversary of Belgian independence.

It is topped by a bronze quadriga sculptural group with a female charioteer, entitled Brabant Raising the National Flag, by Jules Lagae and Thomas Vincotte.

The north wing, built by Gédéon Bordiau, has been occupied by the Aviation Hall since 1972, when the Air and Space gallery was inaugurated.

[14] The museum consists of several parts, including a national collection of artefacts from prehistory to the Merovingian period (c. 751 AD), as well as from classical antiquity of the Near East, Egypt, Greece and Rome.

Additionally, a collection of European decorative arts includes pieces from the Middle Ages to the 20th century, such as sculptures, furniture, tapestries, textiles, costumes, old vehicles, etc.

The original building was constructed in 1880 by architect Ernest Van Humbeeck [fr] in an Arabic style, to form the east pavilion of the National Exhibition.

The mosque, designed by the Tunisian architect Mongi Boubaker, was inaugurated in 1978 in the presence of Khalid ibn Abd al-Aziz and Baudouin.

Partly due to the proximity of the Great Mosque of Brussels, an inscription regarding the Arab slave trade is the subject of ongoing controversy.

[19] In September 2007, then-European Commissioner for Administrative Affairs, Siim Kallas, together with then-Minister-President of the Brussels-Capital Region, Charles Picqué, unveiled plans for rebuilding the European district.