Anastasio de Filiis (Terni 1577 - Naples 1608), together with Prince Federico Cesi, the Dutch physician Johannes van Heeck and Francesco Stelluti, was one of the four founding members of the Accademia dei Lincei.
Anastasio was the oldest of three brothers, one of whom, Angelo (1583-1624), became librarian of the Accademia dei Lincei and wrote a dedicatory preface to Galileo's Letters on Sunspots.
[7] Like other early members, Anastasio de Filiis was forced to leave Rome in the years following the founding of the Lincei because of pressure from the Duke of Acquasparta, father of Prince Cesi, who suspected the four young men of indulging in magical practices and immoral behaviour.
The correspondence between the four young men reveals that in those years (1603-1606), the de Filiis often moved around, living alternately in Terni and Rome.
[8] Of his works, which were among the lost manuscripts of the Biblioteca Albani,[9] only two titles are known: 'De arcanis naturalibus' and 'Novae saecundorum motuum tabulae ab Eclipsato Lyncaeo delineatae' .