Excerpt:
The finest castle in Europe, the Castel del Monte, should in no way be omitted from this quest for Frederican castles in the Bari provincial area. 18 Km. from Andria on a hill 540 m. high and overlooking a vast expanse, it is famous for its octagonal structure, Each of its sides measures 16.50 m; its geometric harmony depends on the fact that there are eight 25 - metre Octagonal towers.