Aalst is a city and municipality on the Dender River, 31 kilometres (19 mi) northwest from Brussels. It is located in the Flemish province of East Flanders in the Denderstreek. The municipality comprises the city of Aalst itself and the villages of Baardegem, Erembodegem, Gijzegem, Herdersem, Hofstade, Meldert, Moorsel and Nieuwerkerken. Aalst is crossed by the Molenbeek-Ter Erpenbeek in Aalst and Hofstade. The current mayor of Aalst is Christoph D'Haese, from the New-Flemish Alliance party. The town has a long-standing (folkloric) feud with Dendermonde (situated north along the same river), which dates back from the Middle Ages.