3rd century BC

Centuries: 4th century BC - 3rd century BC - 2nd century BC
Decades: 290s BC 280s 270s 260s 250s 240s 230s 220s 210s 200s BC


(2nd millennium BC - 1st millennium BC - 1st millennium)

Contents

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Events

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Significant persons

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Inventions, discoveries, introductions

  • Eratosthenes accurately calculates diameter of the Earth
  • Weiqi well-established in China, and may date back to the 2nd millennium BC
  • Stone of Canopus (for Ptolemy III), No. 1, in Rosetta Stone Series of 3 stones. Implements Leap year in Egypt. Leap year not formally recognized until Caesar in 55 B.C.
  • 293 BC: first Roman Sundial [Pliny (79ce): Natural History 7.213]
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Decades and years

300s BC 309 BC 308 BC 307 BC 306 BC 305 BC 304 BC 303 BC 302 BC 301 BC 300 BC
290s BC 299 BC 298 BC 297 BC 296 BC 295 BC 294 BC 293 BC 292 BC 291 BC 290 BC
280s BC 289 BC 288 BC 287 BC 286 BC 285 BC 284 BC 283 BC 282 BC 281 BC 280 BC
270s BC 279 BC 278 BC 277 BC 276 BC 275 BC 274 BC 273 BC 272 BC 271 BC 270 BC
260s BC 269 BC 268 BC 267 BC 266 BC 265 BC 264 BC 263 BC 262 BC 261 BC 260 BC
250s BC 259 BC 258 BC 257 BC 256 BC 255 BC 254 BC 253 BC 252 BC 251 BC 250 BC
240s BC 249 BC 248 BC 247 BC 246 BC 245 BC 244 BC 243 BC 242 BC 241 BC 240 BC
230s BC 239 BC 238 BC 237 BC 236 BC 235 BC 234 BC 233 BC 232 BC 231 BC 230 BC
220s BC 229 BC 228 BC 227 BC 226 BC 225 BC 224 BC 223 BC 222 BC 221 BC 220 BC
210s BC 219 BC 218 BC 217 BC 216 BC 215 BC 214 BC 213 BC 212 BC 211 BC 210 BC
200s BC 209 BC 208 BC 207 BC 206 BC 205 BC 204 BC 203 BC 202 BC 201 BC 200 BC
190s BC 199 BC 198 BC 197 BC 196 BC 195 BC 194 BC 193 BC 192 BC 191 BC 190 BC