The first plans to undertake a major restoration of Mdina's walls were made in 2006, as part of a project that also included restoration of the fortifications of Valletta, Birgu and the Cittadella. In the case of Mdina, the main focus was to consolidate the terrain, since the city is built on a blue clay plateau which is prone to subsidence. The multimillion-euro restoration was partially financed by the European Regional Development Fund. Works began in early 2008 by the Restoration Unit. The process of restoration was documented by Dr. Spiteri.
