The floor plan has been said to derive from Serlio's drawing (in Book III of his "Five Books of Architecture") of Giuliano da Majano's Villa Poggio Reale near Naples of the late 15th century, with elevations derived from Hans Vredeman de Vries. The architectural historian Mark Girouard has suggested that the design is in fact derived from Nikolaus de Lyra's reconstruction, and Josephus's description, of Solomon's Temple in Jerusalem, with a more direct inspiration being the mid-16th century Mount Edgcumbe in Cornwall, which Smythson knew.