Dionysius I.

Dionysios I is the name of the following people:

• Dionysius I of Antioch , martyr and Orthodox saint, Patriarch of Antioch from 1293 to 1308
• Dionysius I of Constantinople , Patriarch of Constantinople from 1466 to 1471 and 1489 to 1491
• Dionysius I of Syracuse (~ 430–367 BC), tyrant of Syracuse

This is a disambiguation page for differentiating between several terms identified with the same word.