Castello Dei Baroni is a 20th-century residence in Wardija, Malta. In the 18th-century, during the magistracy of Grand Master Emmanuel de Rohan-Polduc, a rural building was constructed on site. The Montalto family owned the whereabouts of its site in the 20th-century, and built the Castello Dei Baroni, incorporating the old structure. It was then purchased by Adrian Busietta and Maria Caruana, when it was renovated into a mock castle and given its name. It has since then mainly served as a wedding reception. Busietta and Caruana enlarged and renovated the building which for a period served as the headquarters of the Ecumenical Order, and for third parties activities. The building remains open to the public, against payment, as a house museum, exhibiting a number of items. It is occasionally used for charity purposes and other initiatives. It is found in a remote area. It is a limestone building with two floors and a back garden. The main layout of the interior feature the intact 18th-century building, a spacious hall, a library, a typical Grand Master bedroom, and a chapel. Visitors are offered an audio visual about the history of the Ecumenical Order, and to view a hunting exhibition. Busietta died in 2016, after which the building was put for sale.