The walls of the fort are constructed from hand-hewn limestone blocks, laid together without mortar.
The government has a fantastic chance to build on some of the building blocks laid over the last five years.
The Romans adopted Etruscan stone construction based on the arch and built many spectacular examples of what they called opus quadratum, or structures of cut stone blocks laid in regular courses.
The most notable of the buildings, an enclosure 250 metres in circumference and 9.75 metres high, was crafted with 900,000 pieces of professionally sliced granite blocks, laid on each other without any binders.
Most of the stone walls existing, however, were built of fairly large squared blocks laid in regular courses as headers (stones or bricks laid with ends toward the face of the wall) and stretchers (stones or bricks laid with lengths parallel to the face of the wall).
This Soviet urban ideal was eventually realised on the west bank of the river, with its wide prospects, squares and promenades, and abundance of five-storey "Khrushchev" flat blocks, laid out on a grid and connected to the factory side by streetcars and four major bridges.
It meant we were pitifully grateful for the "trods": these ancient pannierways, stone blocks laid end to end, took us up and over fields and down through pungent carpets of wild garlic, transforming themselves into stepping stones to bear us safely across thrillingly frisky becks.
You won't find any long-winded panels about 'Music 2.0' or the death of the traditional music industry here: the participants are too busy swapping ideas, sharing code and building the future using blocks laid down by companies like SoundCloud, Songkick, 7digital, Last.fm and The Echonest.
It was constructed of huge stone blocks laid over wooden foundations without binder.
The circular tower, 18.5 m high from the ground to the lantern, is made of sandstone blocks laid in regular courses.
