Some archaeological investigation at the site was conducted in 1933, 1949, and 1957.
The first archaeological investigation of the site was carried out in 1964.
Everything we know about this time comes from archaeological investigations.
The site has been the subject of archaeological investigations since the 1830s.
Archaeological investigations were carried out between 1969-71 and in 1973.
Some archaeological investigations have recently been carried out but the results are not yet known.
The site has never been subject to detailed archaeological investigation.
Archaeological investigations in 1959 and 1961 estimated its age at about 3,000 years.
The town's restoration was followed in 1994-1995 with an archaeological investigation.
During the 1998-99 renovation, an archaeological investigation was done around the church.