In 1791, he was made managing director of the theatre at Weimar, and in 1794 he began a friendship with the dramatist, historian, and philosopher Friedrich Schiller, whose plays he premiered until Schiller's death in 1805.
En 1791 converteuse en director do teatro de Weimar, e en 1794 comezou a amizade co dramaturgo, historiador e filósofo Friedrich Schiller, cuxas obras estreou ata a morte de Schiller en 1805.