After the church's destruction in the Great Fire, the parish was united with that of St Martin Pomeroy, a tiny church that already shared the small churchyard of St Olave Old Jewry. The two pre-Fire churches were nearly adjacent. Rebuilding began in 1671, incorporating much of the medieval walls and foundations. The tower was built separately, projecting from the west of the church, and required the carpenter to build a timber platform below ground to support the rubble foundation. The church was completed in 1679 at a cost of £5,580, including £10 paid to the then still ruined St Paul's Cathedral for rubble.