The city was visited by Emperor Constans I (r. 337–350) in 347 and 350, Julian (r. 361–363) during his Persian campaign in 362, and Julian's successor Jovian (r. 363–364) in winter 363/364 (he entered his consulship while in the city). After Jovian's death soon after, Valentinian I (r. 364–375) was acclaimed emperor at Ancyra, and in the next year his brother Valens (r. 364–378) used Ancyra as his base against the usurper Procopius. When the province of Galatia was divided sometime in 396/99, Ancyra remained the civil capital of Galatia I, as well as its ecclesiastical center (metropolitan see). Emperor Arcadius (r. 383–408) frequently used the city as his summer residence, and some information about the ecclesiastical affairs of the city during the early 5th century is found in the works of Palladius of Galatia and Nilus of Galatia.