The first excavations on the site were carried out in the years 1930 and 1931.

In early 2009 further exploration and excavation was carried out.

However, no excavations have been carried out inside that church.

The excavation will be carried out 24 hours a day, he added, and could last up to two weeks.

Since then further investigations and excavations have been carried out.

Between April 1985 and 1986, additional excavations were carried out.

Several excavations in different places within the old city area were carried out between the years 1985-1994.

Limited excavations were carried out in 1937, 1954 and 1957.

Minor excavations were carried out in the 19th century, 1970s and 1990s.

Further excavations were carried out in the 1970s and 1980s.