The Pantheon of Agrippa, 1833 (etching with brown wash)

Le Pantheon d'Agrippa; Engraved by Pietro Fontana (1762-1837); from 'Recueil des vues au bister dessinees et lavees par Callimachus, Souvenirs d'antiquites et curiosites de Rome et des environs, Deblayements et reparations du Pape Pie VII'; M. Agrippa, L.F. Cos. tertium fecit; Original was built by Agrippa (c.63-12 BC) in 27 BC to commemorate the victory of Actium; Rebuilt by Hadrian (16-138) c.126; Consecrated as a Christian church in 609; Pope Urban VIII (1623-44) had Bernini (1598-1680) build two turrets (removed in 1883); Portico restored in 1662; Iron railing fitted to the portico in 1668; The dome is the world's largest unreinforced concrete dome; Santa Maria Rotonda; Piazza della Rotonda;