Tiryns designated P3X-752 of Tau'ri was a planet in the Milky Way galaxy which has a Stargate. Tiryns is small planet with a mildly poisonous atmosphere and a local climate and topography that makes it all some kind of food is difficult. Pelops placed humans from Earth to experiment on them as the experiment Argosians allowing him to study human evolution. Tiryns has a nitrogen-oxygen Earth's atmosphere similar but with higher concentrations of argon and xenon.
Pelops found a region where a handful of small mostly dormant volcanos spewed gases into the local atmosphere. He moved Stargate to this location and founded Tirynsian village and his temple nearby. The temple in the village is located in the center of the village and is an almost exact replica of the Temple of Argos. (RPG: "Fantastic Frontiers: Stargate Season One")