The architecture of the bird-cage with its hexastyle potico, recalling Andrea Palladio's Temple of Scisi, derives from the Lord Mayor's Mansion House, London, which in turn was inspired by Sir Richard Child's, Wanstead House, Essex, illustrated in Colen Campbell's Vitruvius Britannicus, 1715. (see S. Jeffery, The Mansion House, Chichester, 1993).