An important element is the development of a database recording all the 100,000 ships built over the last two centuries.

The ancient city of Troy, for instance, is actually numerous settlements, built one on top of the other over the centuries.

It is now half-buried because other monuments were built above it over the centuries.

The Town contains several old British military barracks, which were built over the centuries.

The stone churches built over the centuries reflect Spanish power that held sway in union with the Church.

The city streets are generally narrow, walled in by a profusion of houses built over the centuries.

From his window on the fourth floor the city rambled forever, built helter-skelter over the centuries.

It was built over the 12th and 13th centuries.

Castle Island has had a number of structures built on it over the centuries.

"The legal structure of this country was built over the centuries to protect the immunity of the ruling class."