(3rd century - 4th century - 5th century - other centuries)
Events
- legalization of Christianity in the Roman Empire
- definitive declaration of biblical canon : Council of Carthage
Significant persons
- Emperor Constantine I
- Saint Martin of Tours
Inventions, Discoveries, Introductions
Decades and Years
| 290s | 290 | 291 | 292 | 293 | 294 | 295 | 296 | 297 | 298 | 299 |
| 300s | 300 | 301 | 302 | 303 | 304 | 305 | 306 | 307 | 308 | 309 |
| 310s | 310 | 311 | 312 | 313 | 314 | 315 | 316 | 317 | 318 | 319 |
| 320s | 320 | 321 | 322 | 323 | 324 | 325 | 326 | 327 | 328 | 329 |
| 330s | 330 | 331 | 332 | 333 | 334 | 335 | 336 | 337 | 338 | 339 |
| 340s | 340 | 341 | 342 | 343 | 344 | 345 | 346 | 347 | 348 | 349 |
| 350s | 350 | 351 | 352 | 353 | 354 | 355 | 356 | 357 | 358 | 359 |
| 360s | 360 | 361 | 362 | 363 | 364 | 365 | 366 | 367 | 368 | 369 |
| 370s | 370 | 371 | 372 | 373 | 374 | 375 | 376 | 377 | 378 | 379 |
| 380s | 380 | 381 | 382 | 383 | 384 | 385 | 386 | 387 | 388 | 389 |
| 390s | 390 | 391 | 392 | 393 | 394 | 395 | 396 | 397 | 398 | 399 |
| 400s | 400 | 401 | 402 | 403 | 404 | 405 | 406 | 407 | 408 | 409 |