Unfortunately the generous benefactress died the next year, in 1442, and the money stopped flowing. There followed more than three centuries during which the abbey finances were never on an entirely secure footing. Privations became part of the monks' daily routine. Indebtedness was compounded by natural and political catastrophes. There was a destructive fire in the winter of 1502/03. The abbey was torched again in 1577 after being pillaged by French soldiers participating in the
religious wars of the period. There was a third destructive fire at the start of the 17th century. On several occasions during the three centuries prior to 1782 plans were drawn up at
Cîteaux Abbey (the Cistercian mother house) to decree the closure of Nizelles: nevertheless each time the place was burned down it somehow proved possible sufficiently to rebuild or restore the abbey. In 1602 the three monks at Nizelles were joined by
Bernard de Montgaillard who was sent by the
chapter at Cîteaux to serve as abbot. Personally austere, and experienced as a monk, Bernard proved an energetic administrator: born in 1562, by the time he came to Nizelles he was already well known to the secular authorities locally. He obtained for the abbey the protection of
Archduke Albert, then governor of the
Spanish Netherlands (approximately modern-day Belgium) and of Albert's duchess,
Isabella. As abbot, Bernard contributed much to restoring the fortunes of Nizelles, although the abbey never returned to its 1442 prosperity. The rebuilding he instigated came to an abrupt halt in 1605 when the Cistercian authorities redeployed him to
Orval Abbey. Eighty years later Nizelles was nevertheless evidently still worth fighting over. A dispute arose as to whether it was still a daughter house of Moulins-Warnant, based on the situation in 1442 when it was founded, or whether it was now a daughter house of Cambron, which had picked up the pieces at the beginning of the 17th century. In 1682 the dispute was settled in favour of Moulins-Warnant. ==Eighteenth century: decline and closure==