Forest Abbey (French: Abbaye de Forest) was a Benedictine Abbey founded in 1105, beside a creek, a tributary of the Zenne, southwest of the city of Brussels, Belgium in the municipality of Forest.
The abbots of Affligem Abbey, which had been the ecclesiastical owners of the parish since the bishop of Cambrai ceded it to them in 1105, decided to build a priory for women in Forest, which would eventually become Forest Abbey. The first prioress was named in 1239. Also in the 13th century, the Romanesque church of Saint Denis was rebuilt in the newer Gothic style. The neighbouring abbey church was rebuilt in the 15th century.
Relics of Saint Alena, whose cult was popular in the region, were formerly kept both in the parish church and in the abbey church, but since 1796 only in the parish church.
Much of the abbey was destroyed by fire on 26 March 1764. The abbey was suppressed on 8 October 1796 and sold the following year. The buildings that survived the dismantling are now owned by the Brussels municipality of Forest, and are used as a cultural centre for seminars, banquets and exhibitions. The Abbey and the site were classified as a historical monument in 1994.
Petronella, daughter of Zeger, castellan of Ghent, installed 9 May 1239.Heylwide de Bouterstin, abbess 1260–1294Marie de ClebbenMachtild van AsseAleydis van PollarClarisse van CattendyckCatherine de BeaufortCatherine van KeisterbekeMarguerite van BouynesYolenta van Ysche, died 2 February 1341Jeanne van Huesdem, elected 14 March 1341Isabelle de Massemyn, died 6 December 1384Aleyde de Goer, elected 6 December 1385, died 29 December 1385Marie de Trazegnies, elected 27 November 1386, died 14 October 1388Marie Sconinckx, elected 14 October 1388, died 6 September 1418Catherine van Magdeghem, elected 7 September 1418, died 10 September 1430Elizabeth Sconinckx, elected 19 February 1430, died 19 August 1457Marguerite van Schoers, elected 20 July 1458, died 1489Catherine van Bouchout, died at Utrecht on 6 October 1498Barbe van Leaucourt, resigned, died at Anderlecht in 1516Margareta van Liedekerke, transferred from the Abbey of Ghislenghien to reform Forest Abbey; arrived 24 July 1500; re-established discipline and good order, died 25 September 1541Marguerite van Liedekerke, niece of previous, died 19 May 1560Françoise de la Douve, died 3 April 1583, during disruptions of the Dutch Revolt: community lived as refugees in Dendermonde and Brussels from 1578; abbey burnt down by rebels in 1582Adrienne du Petit-Cambrai, appointed by royal letters patent, installed 27 September 1587, rebuilt the monastery, died 6 November 1608Maria de Taye, 25th abbess, installed 29 January 1609; died 29 July 1637Françoise de Bette, 26th abbess, installed 25 July 1638; died 29 August 1666Catherine Quarré, installed 12 September 1667; died 1 September 1668Dorothée Christine d'Yves, installed 12 January 1670, died 15 October 1692Agnes Scholastica de Riviere d'Arschot, great niece of Françoise de Bette, elected 18 January 1693; died 19 February 1712During a five-year vacancy the abbey was governed by the prioress, Florence van EyckMarie-Josephe d'Espinosa, installed 22 December 1716; died 8 January 1743Jeanne-Thérèse de Roissin, consecrated 9 June 1743; died 27 December 1756Françoise de Landas, installed 26 April 1757, died 27 July 1760Marie-Josephe de Bouzies, 33rd abbess, installed 19 October 1760Juana Francisca de Rueda de Conteras, last abbess 1785–1796
