The castle is, according to the archaeologist Krystallo Mantzana, a "typical Byzantine fortification", with an elongated shape along an axis from southwest to north, strengthened by square towers. The castle comprises three distinct
enceintes on different levels of the hill: the lower fortress on the southern slope of the hill; the middle fortress, which is the largest of the three; and the inner fortress, also known by its Turkish name
Its Kale (Ιτς Καλέ), which lies on the northeastern corner of the castle is protected by four particularly large and tall towers. Traces of the original Justinianian fortification have been found in the southern slopes, as well as the area of the inner citadel. On the eastern side of the castle is the Clock Tower of Trikala, originally erected in the mid-17th century by the Ottomans. The original tower was destroyed by the Germans during
World War II, and was rebuilt after the war. ==References==