At the end of the 3rd century Arlon was fortified with the construction of ramparts. This castrum was 800 metres in circumference with walls that were 4 metres thick and 8 metres high with two gateways and around 20 watch towers. The Neptune tower was identical to the Jupiter tower recently discovered near to the Town Hall. The small museum consists of remains of the tower which were discovered during archaeological excavations in 1948. In the foundations of the wall one can see various sculpted stones from the ancient vicus including asuperb bas-relief representing Neptune. To visit the Neptune Roman Tower, a key can be obtained from Maison Knopes, 24 Grand Place.References:
The Broch of Gurness is an Iron Age broch village. Settlement here began sometime between 500 and 200 BC. At the centre of the settlement is a stone tower or broch, which once probably reached a height of around 10 metres. Its interior is divided into sections by upright slabs. The tower features two skins of drystone walls, with stone-floored galleries in between. These are accessed by steps. Stone ledges suggest that there was once an upper storey with a timber floor. The roof would have been thatched, surrounded by a wall walk linked by stairs to the ground floor. The broch features two hearths and a subterranean stone cistern with steps leading down into it. It is thought to have some religious significance, relating to an Iron Age cult of the underground.
The remains of the central tower are up to 3.6 metres high, and the stone walls are up to 4.1 metres thick.