1. Constantine’s Conversion and Old Saint Peter’s

3. The labarum (chi-rho and wreath on military standard)

26. Spiral columns: one in Bernini’s baldacchino, eight in reliquary tribunes

39. Baths, Rome Forum

40. *Baths of Diocletian, 306 A.D.

41. *Baths of Diocletian, 306 A.D. (=Sta. Maria degli Angeli, Michelangelo, 1560)

42. Baths of Diocletian, 306 Basilica of Maxentius and Constantine, 312

43. OSP Basilica of Maxentius and Constantine

44. OSP Basilica of Maxentius and Constantine

45. OSP 320? Curia 290

46. OSP Pantheon

47. OSP Pantheon

54. OSP Temple of Mars Ultor