Metapontum was an important city of Magna Graecia, situated on the gulf of Tarentum, between the river Bradanus and the Casuentus (modern Basento). It was founded by the Achaeans of the Greek Peloponnese c. 720 BCE as part of the wave of Greek colonization from the 8th century BCE onwards across the entire region of southern Italy. Thriving on agriculture and trade, the city became one of the most prosperous colonies in Magna Graecia.
Today, the best surviving evidence of Metapontum's importance in antiquity is the 6th century BCE Temple of Hera with 15 of its Doric columns still standing. A theatre was built over the assembly place in the 5th century BCE which had half columns and a Doric frieze. The theatre was remodelled again in the mid-4th century BCE and in its current form measured 62 metres at its widest part and could seat some 8,000 people.
References:Celje Castle was once the largest fortification on Slovenian territory. The first fortified building on the site (a Romanesque palace) was built in the first half of the 13th century by the Counts of Heunburg from Carinthia on the stony outcrop on the western side of the ridge where the castle stands. It had five sides, or four plus the southern side, which was a natural defence. The first written records of the castle date back to between 1125 and 1137; it was probably built by Count Gunter. In the western section of the castle, there was a building with several floors. Remains of the walls of this palatium have survived. In the eastern section, there was an enclosed courtyard with large water reservoirs. The eastern wall, which protects the castle from its most exposed side, was around three metres thicker than the rest of the curtain wall. The wall was topped with a parapet and protected walkway.