Despite its lack of appeal today, Andria was a favourite haunt of Frederick II, who was responsible for the major local attraction, the Castel del Monte, 17km south – the most extraordinary of all Puglia’s castles and one of the finest surviving examples of Swabian architecture.

Begun by Frederick in the 1240s, the castle is a high, isolated fortress built around an octagonal courtyard in two storeys of eight rooms. A mystery surrounds its intended purpose. Although there was once an iron gate that could be lowered over the main entrance, there are no other visible signs of fortification, and the castle may have served merely as a hunting lodge. Nonetheless, the mathematical precision involved in its construction, and the preoccupation with the number eight, have intrigued writers for centuries. It’s argued the castle is in fact an enormous astrological calendar, or that Frederick may have had the octagonal Omar mosque in Jerusalem in mind when he designed it; yet, despite his recorded fascination with the sciences, no one really knows the truth. There is only one record of its use. The defeat of Manfred, Frederick’s illegitimate son, at the battle of Benevento in 1266 signalled the end of Swabian power in Puglia; and Manfred’s sons and heirs were imprisoned in the castle for more than thirty years – a lonely place to be incarcerated.

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