46. See Donat. Roma Antiqua,1. iii. c. 14,1. iv. c. 12; and
the learned, though confused, Dissertation of Bargaeus on
Obelisks, inserted in the fourth volume of Graevius's Roman
Antiquities, p. 1897-1936. This dissertation is dedicated to
Pope Sixtus V., who erected the obelisk of Constantius in
the square before the patriarchal church of St. John
Lateran.