Palazzo Altemps is the Museo Nazionale Romano's sculpture museum — Greek and Roman marble displayed in a 15th-century cardinal's palace with frescoed ceilings, near Piazza Navona. The Ludovisi Throne (5th century BC — Aphrodite rising from the sea, transparent wet drapery). The Galatian Suicide (Gaul killing himself to avoid capture — one of antiquity's most dramatic compositions). €10 combo covers 4 museums, 3 days. This one: zero queue, zero crowds, pure beauty.
Must-see: Ludovisi Throne (Room 5 — the drapery technique is 2,500 years old and unsurpassed). Grande Ludovisi Sarcophagus (battle scene, 250 AD, 100+ figures in violent motion). Galatian Suicide. Ares Ludovisi (restored by Bernini — he added the Cupid at the god's feet). The palace: Frescoed rooms, painted loggias, the church of Sant'Aniceto (private chapel with Baroque altarpiece). Practical: Piazza di Sant'Apollinare 46. €10 MNR combo. Tue-Sun 11am-6pm. 1h.