The Nicene Creed. June 19, 325.

The First Council of Nicaea was the first ecumenical council of the Church. Most significantly, it resulted in the first uniform Christian doctrine, called the Nicene Creed. With the creation of the creed, a precedent was established for subsequent local and regional councils of Bishops (Synods) to create statements of belief and canons of doctrinal orthodoxy—the intent being to define unity of beliefs for the whole of Christendom. Derived from Greek (literally, ‘the inhabited one’), “ecumenical” means “worldwide” but generally is assumed to be limited to the known inhabited Earth, and at this time in history is synonymous with the Roman Empire; the earliest extant uses of the term for a council are Eusebius’ Life of Constantine which states “...

The Dome Collapses. May 7, 558.

On 23 February 532, only a few weeks after the destruction of the second basilica, Emperor Justinian I decided to build a third and entirely different basilica, larger and more majestic than its predecessors, built by Constantius II and Theodosius II. Justinian chose physicist Isidore of Miletus and mathematician Anthemius of Tralles as architects; Anthemius, however, died within the first year of the endeavor. The construction is described in the Byzantine historian Procopius’ On Buildings (Peri ktismatōn, Latin: De aedificiis). Columns and other marbles were brought from all over the empire, throughout the Mediterranean. Even though they were made specifically for Hagia Sophia, the columns show variations in size. More than ten thousand people were employed. This new church was con...

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