Greenwich: Home of the Prime Meridian and Maritime Heritage

Greenwich, a Royal Borough on the south bank of the Thames in London, is globally synonymous with time and navigation.

The Prime Meridian (0° Longitude)

Since the 1884 International Meridian Conference, the line through the Royal Observatory's Airy Transit Circle defines 0° longitude. Before 1884, nations used Paris, Cadiz, Copenhagen, or local meridians. Britain's naval dominance and the Observatory's Nautical Almanac (published since 1767) made Greenwich the de facto standard for charts and chronometers.

Visitors can straddle the Meridian Line in the Observatory courtyard—one foot East, one West. The Greenwich Mean Time (GMT) clock (Shepherd Gate Clock, 1852) displays mean solar time year-round (no DST).

Maritime Greenwich (UNESCO World Heritage Site, 1997)

• Royal Observatory – Flamsteed House (1675), Harrison's marine chronometers (H1–H4), the solve of the longitude problem.
• National Maritime Museum – World's largest maritime collection: Nelson's Victory coat, Turner's Battle of Trafalgar, polar exploration artifacts.
• Cutty Sark – Last surviving tea clipper (1869), raised 3m in dry dock; walk beneath the copper hull.
• Old Royal Naval College – Wren/Hawksmoor masterpiece (1696–1712). Painted Hall ("UK's Sistine Chapel"), Chapel, Thor/Les Mis filming location.
• Queen's House – Inigo Jones (1616–35), first Palladian building in England. Tulip Stairs, Armada Portrait.
• Greenwich Park – 183 acres, deer herd, General Wolfe statue, panoramic Thames/London views.

Beyond the Tourist Core

Greenwich Market (crafts, antiques, street food), the Fan Museum, Ranger's House (Wernher Collection), and the Thames Path make it a full-day destination. DLR/Elizabeth line/river bus access from central London in 20–30 minutes.

Greenwich didn't just measure time—it synchronized the world.