sentences:  During the Achaemenid period, Tishtrya was conflated with Semitic Nabu-*Tiri, and thus came to be associated with the Dog Star, Sirius.The Tiregan festival, previously associated with *Tiri (a reconstructed name), was likewise transferred to Tishtrya.During the Hellenic period, Tishtrya came to be associated with Pythian Apollo, patron of Delphi, and thus a divinity of oracles.