Prague Castle, the Royal Garden and the Belvedere. The Royal Garden is a 16th century garden, established by order of King Ferdinand the First. Initially, it was planned to grow trees that are not in Central Europe, therefore, saplings were brought here and specialists of those times carefully monitored plants. There was a lot of trees for which the garden was created, almost under each there is a sign describing when it was planted, as called and a little brief information about the form.