LacusCurtiusLacusCurtius: a large site on Roman antiquity, including a photosampler of Roman and Etruscan cities and monuments (with a very large site on the city of Rome of course); a site for teaching yourself to read Latin inscriptions; the complete Latin texts of Pliny the Elder's Natural History, Quintus Curtius' Histories of Alexander the Great, the Saturnalia of Macrobius, and Censorinus' de Die Natali; Suetonius, the Historia Augusta, Vitruvius, Claudian, Frontinus, Velleius Paterculus, Celsus, and Cato's de Re Rustica in both Latin and English; complete English translations of Caesar, Plutarch's Lives, Polybius, Cassius Dio, Appian's Civil Wars, Dio Chrysostom, Dionysius of Halicarnassus, Quintilian, and Oppian; several complete Greek texts in the original Greek; Rodolfo Lanciani's book Pagan and Christian Rome, Christian Hülsen's book on the Roman Forum, Bury's 2‑vol. History of the Later Roman Empire, Bevan's House of Ptolemy, 4 books on Roman Britain, George Dennis's Cities and Cemeteries of Etruria; Platner and Ashby's Topographical Dictionary of Ancient Rome (nearly complete) and most of Smith's Dictionary of Greek and Roman Antiquities; about 45% of Plutarch's Moralia; some maps of the Roman Empire, and lots more.