^This is a modern recalculation of the seating capacity at the Circus, a substantial downward revision of Pliny the Elder's estimate of 250,000. For discussion see Humphrey, p. 216.
^Edward Chaney, "Roma Britannica and the Cultural Memory of Egypt: Lord Arundel and the Obelisk of Domitian", in Roma Britannica: Art Patronage and Cultural Exchange in Eighteenth-Century Rome, eds. D. Marshall, K. Wolfe and S. Russell, British School at Rome, 2011, pp. 147–70