The Round Tower was built between 1418 and 1426, overlooking the entrance to
the harbour. The Square Tower adjoining
was erected in 1494 and built up in the mid 19th century. Long Curtain and
Kings Bastion defences were added in the 17th century.
The Porstmouth earth & timber town defences were erected in the late 14th
century and strengthened in 1539. Built up by De Gomme in 1660 into 1.5 mile
defence. Part of Long Curtain and Kings Bastion remain, close by the shore,
but the rest has been built over.
The 1 mile defensive line around Portsea was started in the 17th century and
extended in the18th century to protect the naval dockyard. Little now remains
apart from some of the ornate gateways.
The Round Tower is open all year.
| Directions |
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| On the south-western corner of Portsea Island. |
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