A Hellenistic tourist list, not a league table. Antipater of Sidon and others named seven sights a traveller from the Mediterranean might still catch. Only the Great Pyramid is still standing. The 2007 “New Seven” is a private poll — the hall shows it as a later annex, not a replacement.
Ancient list after the conventional seven (pyramid, walls of Babylon sometimes swapped with the lighthouse). Dates are traditional. Heights of lost wonders are literary. New Seven: New7Wonders Foundation poll, 2007 — a marketing exercise with real buildings attached.