When was Hagia Sophia built under Justinian I?

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Mosaic detail of Emperor Justinian I with a jeweled crown and halo, wearing ornate robes, from the Church of San Vitale in Ravenna, Italy. — Justinian I Justinian I, detail of a mosaic in the Church of San Vitale, Ravenna, Italy.

The Hagia Sophia that exists today was built under the direction of Justinian I between 532 and 537 CE. The construction of this edifice was commissioned following the destruction of its predecessor during the Nika insurrection in January 532. The project was completed in the remarkably short period of five years, 10 months, and four days, under the direction of architects Anthemius of Tralles and Isidorus of Miletus.123