The last major excavations took place in the period 1950-60.

However, no excavations took place at the site until the 1930s.

Since then, various excavations have taken place at the site.

A major archaeological excavation took place in the years 1986 to 1990.

The real excavations took place over two seasons, 1938 and 1939.

Excavations have taken place on a regular basis since then.

If the second version of events is correct, then no professional excavation has ever taken place.

The chamber was discovered in 1995 when excavations were taking place on the site.

Excavations took place in 1885, as a railway was run through the area.

No excavation took place until the bored piles were in position.