Information about 399

300 (three hundred) is the natural number following two hundred ninety-nine and preceding three hundred one.

Mathematical properties

It is a triangular number and the sum of a pair of twin primes (149 + 151), as well as the sum of ten consecutive primes (13 +
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Upper Paleolithic
• 10th millennium BC | 9th millennium BC | 8th millennium BC
• 7th millennium BC | 6th millennium BC | 5th millennium BC

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The 3rd century is the period from 201 to 300 in accordance with the Julian calendar in the Christian Era.

Overview

After the death of Commodus in the previous century the Roman Empire was plunged into a civil war.
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As a means of recording the passage of time, the 4th century (per the Julian/Gregorian calendar and Anno Domini era) was that century which lasted from 301 to 400.

Overview

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The 5th century is the period from 401 to 500 in accordance with the Julian calendar in Anno Domini, the year of our Lord.

Overview

The Western Roman Empire is ruled by a succession of weak emperors, and true power falls increasingly into the hands of powerful generals.
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list of decades which have articles with more information about them.

During the twentieth century, it became popular to look at that century's decades as historical entities in themselves.
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Centuries: 3rd century - 4th century - 5th century

330s 340s 350s - 360s - 370s 380s 390s
360 361 362 363 364
365 366 367 368 369

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Events and Trends

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Centuries: 3rd century - 4th century - 5th century

340s 350s 360s - 370s - 380s 390s 400s
370 371 372 373 374
375 376 377 378 379

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Events and Trends

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Centuries: 3rd century - 4th century - 5th century

350s 360s 370s - 380s - 390s 400s 410s
380 381 382 383 384
385 386 387 388 389

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Events and Trends

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Centuries: 3rd century - 4th century - 5th century

360s 370s 380s - 390s - 400s 410s 420s
390 391 392 393 394
395 396 397 398 399

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Events and Trends

• Gildonic revolt in Africa Province (397–398)

Births

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Centuries: 4th century - 5th century - 6th century

370s 380s 390s - 400s - 410s 420s 430s
400 401 402 403 404
405 406 407 408 409

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Events and Trends

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Centuries: 4th century - 5th century - 6th century

380s 390s 400s - 410s - 420s 430s 440s
410 411 412 413 414
415 416 417 418 419

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Events and Trends

• Sack of Rome by the Visigoths under Alaric.

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Centuries: 4th century - 5th century - 6th century

390s 400s 410s - 420s - 430s 440s 450s
420 421 422 423 424
425 426 427 428 429

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Events and Trends

• Saint Augustine of Hippo publishes The City of God.

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This page indexes the individual years pages.

Twenty-first century

2100 - 2099 - 2098 - 2097 - 2096 - 2095 - 2094 - 2093 - 2092 - 2091

2090 - 2089 - 2088 - 2087 - 2086 - 2085 - 2084 - 2083 - 2082 - 2081

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4th century · 5th century
360s 370s 380s 390s 400s 410s 420s
393 394 395 396 397 398 399
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4th century - 5th century
360s  370s  380s  - 390s -  400s  410s  420s
394 395 396 - 397 - 398 399 400
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4th century · 5th century
360s 370s 380s 390s 400s 410s 420s
395 396 397 398 399 400 401
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4th century · 5th century
370s 380s 390s 400s 410s 420s 430s
397 398 399 400 401 402 403
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<noinclude>

This article is about the year 401. For other uses, see 401 (disambiguation)

4th century · 5th century · 6th century
370s 380s 390s 400s
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5th century · 6th century
370s 380s 390s 400s 410s 420s 430s
399 400 401 402 403 404 405
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Axum – Eon, King of Axum

Asia

• China
• Eastern Jin Dynasty - Emperor An, Emperor of Eastern Jin (397-402)
• Northern Wei Dynasty

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Gregorian calendar is the most widely used calendar in the world. A modification of the Julian calendar, it was first proposed by the Calabrian doctor Aloysius Lilius, and was decreed by Pope Gregory XIII, for whom it was named, on 24 February 1582 via the papal bull
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Ab Urbe condita (literally, "from the city, having been founded") is a monumental history of Rome, from its legendary founding (ab Urbe condita, dated to 753 BC by Varro and most modern scholars). The book was written by Titus Livius (around 59 BC–AD 17).
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Armenian calendar uses the Armenian numerals. It begins in AD 552 as the start of the Armenian era.

Dates are marked by the letters ԹՎ
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Buddhist calendar is used on mainland Southeast Asia in the countries of Cambodia, Laos, Thailand, Myanmar (formerly Burma) and Sri Lanka in several related forms. It is a lunisolar calendar having months that are alternately 29 and 30 days, with an intercalated day and a 30-day
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Chinese calendar is a lunisolar calendar, incorporating elements of a lunar calendar with those of a solar calendar. In China today, the Gregorian calendar is used for most day to day activities, but the Chinese calendar is still used for marking traditional Chinese holidays such
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The Chinese sexagenary cycle (Chinese: 干支; Pinyin: gānzhī) is a cyclic numeral system of 60 combinations of the two basic cycles, the ten Heavenly Stems (天干;
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The Chinese sexagenary cycle (Chinese: 干支; Pinyin: gānzhī) is a cyclic numeral system of 60 combinations of the two basic cycles, the ten Heavenly Stems (天干;
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Coptic calendar, also called the Alexandrian calendar, is used by the Coptic Orthodox Church. This calendar is based on the ancient Egyptian calendar. To avoid the calendar creep of the latter, a reform of the ancient Egyptian calendar was introduced at the time of Ptolemy
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Ethiopian calendar (Amharic: የኢትዮጵያ ዘመን አቆጣጠር ye'Ītyōṗṗyā zemen āḳoṭaṭer), also called the
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