1420: Bliain
| Blianta: 1417 1418 1419 - 1420 (MCDXX) - 1421 1422 1423 | |
| Deicheanna blianta: 1390í 1400í 1410í - 1420í - 1430í 1440í 1450í | |
| Céadta blianta: 14ú céad - 15ú céad - 16ú céad | |
Eachtraí
- Conradh Troyes
- Chaill Sigismund, Impire Naofa Rómhánach, Cath Vysehrad.
Breitheanna
- Antoinette de Maignelais
- Tomás de Torquemada
Básanna
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