How did Johann Bernhard Fischer von Erlach gain public recognition in Vienna?

Johann Bernhard Fischer von Erlach gained significant public recognition in Vienna in 1690 when he designed two temporary triumphal arches to celebrate the entry of Joseph I into the city following his coronation as king in Frankfurt am Main.1

This success helped establish his reputation as a leading architect, leading to a period of high demand for his work in Vienna, Salzburg, and across the Habsburg lands. By 1693, he was commissioned to design 14 important buildings in a single year. His prominence was further solidified through his role as court architect to three successive emperors—Leopold I, Joseph I, and Charles VI—and his creation of influential architectural designs, such as the Winter Palace of Prince Eugene of Savoy. Later in his career, he secured the commission for the Karlskirche, a major project commissioned by Charles VI to commemorate the city's deliverance from a plague epidemic.123