first mentioned in the records in 1430. Jan had five sons, four of whom were also painters. Bosch's father, Anthonius van Aken (died 1478), acted as artistic adviser to the Illustrious Brotherhood of Our Blessed Lady. It is generally assumed that either Bosch's father or one of his uncles taught the artist to paint, but none of their works survive. Bosch first appears in the municipal record on 5 April 1474, when he is named along with two brothers and a sister. 's-Hertogenbosch was a flourishing city in 15th-century Brabant, in the south of the present-day Netherlands, at the time part of the Burgundian Netherlands, and during its lifetime passing through marriage to the Habsburgs. In 1463, four thousand houses in the town were destroyed by a catastrophic fire, which the then (approximately) thirteen-year-old Bosch presumably witnessed. He became a popular painter in his lifetime and often received commissions from abroad. In 1486/7 he joined the highly respected Brotherhood of Our Lady, a devotional confraternity of some forty influential citizens of , and seven thousand 'outer-members' from around Europe. Sometime between 1479 and 1481, Bosch married Aleyt Goyaerts van den Meerveen, who was a few years his senior. The couple moved to the nearby town of Oirschot, where Aleyt Goyaerts van den Meerveen had inherited a house and land from her wealthy family. An entry in the accounts of the Brotherhood of Our Lady records Bosch's death in 1516. A funeral mass served in his memory was held in the church of Saint John on 9 August of that year. Works Bosch produced at least sixteen triptychs: of them, eight survive fully intact with another five surviving in fragments. Bosch's works are generally organised into three periods of his life dealing with the early works (c. 1470–1485), the middle period (c. 1485–1500), and the late period (c. 1500 until his death). According to Stefan Fischer, thirteen of Bosch's surviving paintings were completed in the late period, with seven attributed to his middle period. Bosch's early period is studied in terms of his workshop activity and possibly some of his drawings. Indeed, he taught pupils in the workshop, who were influenced by him. The recent dendrochronological investigation of the oak panels by the scientists at the Bosch Research and Conservation Project led to a more precise dating of the majority of Bosch's paintings. Bosch sometimes painted in a comparatively sketchy manner,