"Auberge de Castille et Leon"(PDF). National Inventory of the Cultural Property of the Maltese Islands. 28 December 2012. Archived from the original(PDF) on 4 March 2016.
"Grandmaster Palace"(PDF). National Inventory of the Cultural Property of the Maltese Islands. 28 December 2012. Archived from the original(PDF) on 7 May 2016.
Zammit, Andre (1986). "Valletta and the system of human settlements in the Maltese Islands". Ekistics. 53 (316/317). Athens Center of Ekistics: 89–95. JSTOR43620704.
"Auberge de Castille et Leon"(PDF). National Inventory of the Cultural Property of the Maltese Islands. 28 December 2012. Archived from the original(PDF) on 4 March 2016.
"Grandmaster Palace"(PDF). National Inventory of the Cultural Property of the Maltese Islands. 28 December 2012. Archived from the original(PDF) on 7 May 2016.