Peter the Patrician (Latin: Petrus Patricius, Greek: Πέτρος ὁ Πατρίκιος, Petros ho Patrikios; c. 500–565) was a senior Byzantine official, diplomat, and historian. A well-educated and successful lawyer, he was repeatedly sent as envoy to Ostrogothic Italy in the prelude to the Gothic War of 535–554. Despite his diplomatic skill, he was not able to avert war, and was imprisoned by the Goths in Ravenna for a few years. Upon his release, he was appointed to the post of magister officiorum, head of the imperial secretariat, which he held for an unparalleled 26 years. In this capacity, he was one of the leading ministers of Emperor Justinian I (r. 527–565), playing an important role in the Byzantine emperor's religious policies and the relations with Sassanid Persia; most notably he led the negotiations for the peace agreement of 562 that ended the 20-year-long Lazic War. His historical writings survive only in fragments, but provide unique source material on early Byzantine ceremonies and diplomatic issues between Byzantium and the Sassanids.
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Peter the Patrician in the context of Fifty-Year Peace Treaty
The Treaty of Dara, also known as the Fifty-Year Peace, was a peace treaty concluded between the Byzantine (Eastern Roman) and Sassanid (Persian) empires at the frontier town of Dara in what is now southern Turkey in 562. The treaty, negotiated by Peter the Patrician for the Byzantine emperor Justinian I and Izadgushasp for the Sassanid king Khosrau I ended the 20-year-long war over the Caucasian kingdom of Lazica. The treaty contained 13 articles, and is well-recorded. It covered all parts of the two empires, Persarmenia, Lazica, the client states, and the Arab allies.
The Sassanids undertook to evacuate Lazica, but the status of the neighboring country of Suania was left unclear to become a future source of disagreement. The Sassanids were to receive an annual subsidy of 30,000 gold nomismata, with the first seven years payable immediately. The expenses of the defense lines in the Caucasus against the nomads in the north, for which there was a mutual interest and had been the responsibility of the Sasanians, were included in the payments. Both sides agreed not to establish new fortifications or fortify the existing settlements on the border. To prevent spying, trade was restricted to Callinicum, Nisibis, and Dvin, while traders from other nations were restricted to Dara (under the Byzantines) and Nisibis (under the Sasanians). Refugees were free to return to their homes. In a separate treaty, the Christians in the Sasanian Empire were promised freedom of religion.
Peter the Patrician in the context of Peace of Nisibis (299)
The Peace of Nisibis of 299, also known as the First Peace of Nisibis, was a peace treaty signed in 299 by the Roman and Sasanian empires, and concluded the Roman–Sasanian War of 296–299. The border established as a result of the treaty was maintained until the Second Peace of Nisibis of 363.
The terms of the treaty are known from a 6th-century summary of its content by Peter the Patrician during the reign of Justinian I.