 Between 1609 and 1611, he is supposed to have taught at the court and therefore received subsidies from the royal treasury.In 1613, the Danish king published a letter stating that all men of the "Roman Catholic" religion must leave Denmark.Aagesen, who had been suspected of being on the Pope's payroll as early as 1604, was informed of a ruling made in the governing body of Copenhagen University on 15 September 1613 that, since he had Catholic sympathies, he should not be allowed to continue as organist.