L’Auberge de Castille et Leon
The Knights used to site the convent or priory’s headquarter where they could build the conventual church, the Pilier’s Palace, the Auberge and houses for the older knights.
The priory of the langue of Castille was a whole district in the centre of Valletta defined by St.John’s Street, Zachery Street, Melita Street and Merchant’s Street. This priory’s architect is unfortunately unknown, but Cassar, who designed Valletta, is the most probable candidate.
At the beginning, the priory was made up of improvised wooden huts but on 26 August 1569, the Spanish Knights assembled in their Auberge in Birgu and decided to create a new Auberge in Valletta.
Since March 4, 1972, the Auberge de Castille has been used as the seat of the Prime Minister. It is here that the Prime Minister Conducts the business of Government . The weekly meetings of the Cabinet are also held in the Auberge.
Derived and for more info: https://opm.gov.mt/history-of-castille?l=1
As Is. Canon S3 IS Handheld