257 and 261

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Difference between 257 and 261

257 vs. 261

Year 257 (CCLVII) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar. Year 261 (CCLXI) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar.

Ab urbe condita

Ab urbe condita or Anno urbis conditae (abbreviated: A.U.C. or AUC) is a convention that was used in antiquity and by classical historians to refer to a given year in Ancient Rome.

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Anno Domini

The terms anno Domini (AD) and before Christ (BC) are used to label or number years in the Julian and Gregorian calendars.

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Calendar era

A calendar era is the year numbering system used by a calendar.

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Gallienus

Gallienus (Publius Licinius Egnatius Gallienus Augustus; c. 218 – 268), also known as Gallien, was Roman Emperor with his father Valerian from 253 to 260 and alone from 260 to 268.

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Julian calendar

The Julian calendar, proposed by Julius Caesar in 46 BC (708 AUC), was a reform of the Roman calendar.

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Roman numerals

The numeric system represented by Roman numerals originated in ancient Rome and remained the usual way of writing numbers throughout Europe well into the Late Middle Ages.

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Sasanian Empire

The Sasanian Empire, also known as the Sassanian, Sasanid, Sassanid or Neo-Persian Empire (known to its inhabitants as Ērānshahr in Middle Persian), was the last period of the Persian Empire (Iran) before the rise of Islam, named after the House of Sasan, which ruled from 224 to 651 AD. The Sasanian Empire, which succeeded the Parthian Empire, was recognised as one of the leading world powers alongside its neighbouring arch-rival the Roman-Byzantine Empire, for a period of more than 400 years.Norman A. Stillman The Jews of Arab Lands pp 22 Jewish Publication Society, 1979 International Congress of Byzantine Studies Proceedings of the 21st International Congress of Byzantine Studies, London, 21–26 August 2006, Volumes 1-3 pp 29. Ashgate Pub Co, 30 sep. 2006 The Sasanian Empire was founded by Ardashir I, after the fall of the Parthian Empire and the defeat of the last Arsacid king, Artabanus V. At its greatest extent, the Sasanian Empire encompassed all of today's Iran, Iraq, Eastern Arabia (Bahrain, Kuwait, Oman, Qatif, Qatar, UAE), the Levant (Syria, Palestine, Lebanon, Israel, Jordan), the Caucasus (Armenia, Georgia, Azerbaijan, Dagestan), Egypt, large parts of Turkey, much of Central Asia (Afghanistan, Turkmenistan, Uzbekistan, Tajikistan), Yemen and Pakistan. According to a legend, the vexilloid of the Sasanian Empire was the Derafsh Kaviani.Khaleghi-Motlagh, The Sasanian Empire during Late Antiquity is considered to have been one of Iran's most important and influential historical periods and constituted the last great Iranian empire before the Muslim conquest and the adoption of Islam. In many ways, the Sasanian period witnessed the peak of ancient Iranian civilisation. The Sasanians' cultural influence extended far beyond the empire's territorial borders, reaching as far as Western Europe, Africa, China and India. It played a prominent role in the formation of both European and Asian medieval art. Much of what later became known as Islamic culture in art, architecture, music and other subject matter was transferred from the Sasanians throughout the Muslim world.

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Shapur I

Shapur I (𐭱𐭧𐭯𐭥𐭧𐭥𐭩; New Persian: rtl), also known as Shapur I the Great, was the second shahanshah (king of kings) of the Sasanian Empire.

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