Italian architect Francesco Chiaramella de Gandino started to plan the citadel in 1557 .
Italian architect Francesco Chiaramella de Gandino was replaced by his compatriot Rochus Graf zu Lynar one year later .
Italian architect Francesco Chiaramella de Gandino started to plan the citadel in 1557 and was replaced by his compatriot Rochus Graf zu Lynar one year later .