Hagia Sophia, Istanbul, Turkey
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Happened as dated, per the source[1]: dome restoration was "scheduled to commence on April 14, 2025"; no completion date has been set for the wider 50-year reinforcement plan.Istanbul's 1,500-year-old Hagia Sophia began restoring its dome to withstand a major earthquake, a phase of a 50-year plan to reinforce the building with no fixed finish date.
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