221

Type Airliner
Manufacturer Boeing
Maiden flight 6 May 1930 The Boeing Model 200 Monomail was a mail plane of the early 1930s. The aircraft marked a departure from the traditional biplane configuration for a transport aircraft, instead featuring a single,
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221 may refer to:

In time:

• The year:
• 221 AD
• 221 BC

In geography:

• Roads:
• U.S.

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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 2nd century is the period from 101 to 200 in accordance with the Julian calendar in the Christian Era. It is considered part of the Classical era, epoch, or historical period
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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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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: 1st century - 2nd century - 3rd century

160s 170s 180s - 190s - 200s 210s 220s
190 191 192 193 194
195 196 197 198 199

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Events and Trends

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Centuries: 2nd century - 3rd century - 4th century

170s 180s 190s - 200s - 210s 220s 230s
200 201 202 203 204
205 206 207 208 209

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Events and Trends

Significant people

• Septimius Severus, Roman Emperor

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Centuries: 2nd century - 3rd century - 4th century

180s 190s 200s - 210s - 220s 230s 240s
210 211 212 213 214
215 216 217 218 219

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Events and Trends

Significant people

• Cao Cao, King of Cao Wei

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Centuries: 2nd century - 3rd century - 4th century

190s 200s 210s - 220s - 230s 240s 250s
220 221 222 223 224
225 226 227 228 229

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Events and Trends

Significant people

• Alexander Severus, Roman Emperor

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Centuries: 2nd century - 3rd century - 4th century

200s 210s 220s - 230s - 240s 250s 260s
230 231 232 233 234
235 236 237 238 239

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Events and Trends

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Centuries: 2nd century - 3rd century - 4th century

210s 220s 230s - 240s - 250s 260s 270s
240 241 242 243 244
245 246 247 248 249

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Events and Trends

• Crisis of the Third Century

Significant people

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Centuries: 2nd century - 3rd century - 4th century

220s 230s 240s - 250s - 260s 270s 280s
250 251 252 253 254
255 256 257 258 259

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Events and Trends

• Crisis of the Third Century

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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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3rd century - 4th century
180s  190s  200s  - 210s -  220s  230s  240s
215 216 217 - 218 - 219 220 221
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3rd century - 4th century
180s  190s  200s  - 210s -  220s  230s  240s
216 217 218 - 219 - 220 221 222
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3rd century - 4th century
190s  200s  210s  - 220s -  230s  240s  250s
217 218 219 - 220 - 221 222 223
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3rd century - 4th century
190s  200s  210s  - 220s -  230s  240s  250s
219 220 221 - 222 - 223 224 225
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3rd century - 4th century
190s  200s  210s  - 220s -  230s  240s  250s
220 221 222 - 223 - 224 225 226
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3rd century - 4th century
190s  200s  210s  - 220s -  230s  240s  250s
221 222 223 - 224 - 225 226 227
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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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