carillon player Matthias Vanden Gheyn for advice. His brother Andreas Jozef then cast or recast 28 bells and finished the carillon, which he inscribed on the largest bell as his "Opus 1". He continued numbering his carillons as if they were musical pieces throughout his career, until his final Opus 23. In 1754, he produced a carillon for the Sint-Truiden belfry and another for the St. Lambert's Cathedral, Liège. Thereafter his uncle Peter Vanden Gheyn left the company and returned after 22 years to the monastery. Andreas Jozef delivered a new carillon for the city of Oudenaarde in 1759, and recast and retuned carillons in the Northern Netherlands, in Goes and Nijkerk. Other works he produced were the carillon of Schoonhoven (ordered in 1775), and some carillons for France, including Opus 6 for the Abbey of Bonnefont in the Haute-Garonne department, and Opus 12 for Liessies Abbey. He was the last capable carillon tuner for more than a century, until John Taylor & Co reinvented the process in 1904 with their first demonstration carillon. All carillons made in between had one or more bells lacking in pure sound. André Louis Vanden Gheyn André Louis Vanden Gheyn was born in Leuven on 7 March 1758, and worked with his father as a bellfounder before moving to Nivelles where he started working independently. The French Revolution and occupation of the Netherlands caused an interruption in the workings of the foundry, and the destruction of many carillons. In 1792, André Louis Vanden Gheyn returned to the bell foundry in Leuven; while he continued working as a bellfounder, he made no carillons. He married Marie-Isabelle Rochet (1751-1843), sister to the organ maker Adrien Rochet. He died in 1833 without having any sons, but his grandson André Louis Jean Van Aerschodt took over the business and signed his bells with both names. Van Aerschodt André Louis Jean Van Aerschodt André Louis Jean Van Aerschodt (3 June 1814 - 13 June 1888) worked from 1829 with his grandfather André Louis Vanden Gheyn. In 1844, André Louis Jean and his younger brother Sévérin cast the Salvator for the St. Rumbold's Cathedral in Mechelen: at 8 tons, it was the heaviest bell in the country for more than 100 years. André Louis Jean was succeeded by his son André Louis Charles Van Aerschodt. Sévérin Van Aerschodt Sévérin Guillaume Van Aerschodt (1819-1885), younger brother to André Louis Jean, first