From 1989 to 1991, new excavations were undertaken both in and around the national park.

Four major archaeological excavation were undertaken from 1972 to the early 1990s.

Archaeological excavations were undertaken at the site between 1947 and 1949.

Archaeological excavations at the site have been undertaken in 1938-41, 1953 and 1974.

Smaller finds come to light almost every time that a major excavation is undertaken.

Prior to the construction of the store, excavations were undertaken at the site.

A large majority of the general public is under the impression that excavations are undertaken for money and not historical data.

No major excavation of the site was undertaken until the turn of the century.

Further excavations have since been undertaken by historians and archaeologists.

Major excavations were undertaken in the early 20th century.