Dashed left edge = started before this timeline ·
Dashed right edge = still ongoing
Events in 138 1
117 – 138Hadrian — the consolidatorHadrian abandons Trajan's eastern conquests, recognising they are indefensible, and devotes his reign to consolidating and fortifying the empire's frontiers. He builds Hadrian's Wall across northern Britain (122–128 AD) — 73 miles of stone — and travels personally to almost every province. A passionate philhellene, he rebuilds Athens and completes the temple of Olympian Zeus. He reorganises the bureaucracy, codifies Roman law and builds the Pantheon — still the best-preserved building of ancient Rome, its concrete dome unsurpassed for 1,300 years.