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Crispus: son of the Roman emperor Constantine I the Great.
- c.300: Crispus
- 1 March 317: declared caesar; Gaius Flavius Julius Crispus
- March 326: executed
- father: Constantine I the Great
- mother: Minervina
- wife: Helena
- 317 Declared caesar, together with his halfbrother Constantinus II and Licinius Junior
- 318 Consul (with Licinius V); accepts the title Sarmaticus Maximus
- 319 active in Gaul; accepts the title Germanicus Maximus
- 321 Consul II (with Constantine II consul II); marriage to Helena
- 324 Consul III (with Constantine II consul III); during the war against Licinius, Crispus command the navy, and defeats Licinius' admiral Amandus
- 326 Fall of Crispus; he and his stepmother Fausta are executed
- Damnatio memoriae