Many of the Gaulish manufacturing sites have been extensively excavated and studied.

Each of these formidable structures has been extensively excavated.

Except for a few sporadic digs, the site has not been extensively excavated.

Burial mounds are found in the area, but have not been extensively excavated.

There is every likelihood that the site may show up no gap at all when excavated extensively.

The ruins of the city are well preserved and have been extensively excavated.

Hill and Black Patch, both of which are have been extensively excavated.

That they have been damaged and not extensively excavated under professional conditions makes analysis difficult.

The East Group is the larger and has been more extensively excavated.

The site has been extensively excavated since 1980.