Sanctuary

Sanctuary, also called Chitauri Space, is the name given to the distant area in the universe inhabited by the Chitauri. It is the domain of Thanos.

History
When Loki fell into Yggdrasil, he was transported to Sanctuary. There he was trained by Thanos in the ways of mind control.

As Loki's adoptive mother Frigga used her powers to look throughout the universe in search of her lost son, she found him in this sector of space, preparing to travel to Earth.

Loki used the Tesseract to open a wormhole between Earth and Sanctuary, where the Chitauri were staged for invasion.

During the invasion Iron Man flew a nuclear bomb through the wormhole into Chitauri Space, hitting the Chitauri Command Center and stopping the invasion before he fell back through to Earth.

After Gamora's betrayal, a furious Ronan the Accuser traveled to Sanctuary and met with Thanos in person and angrily berated him for not taking Gamora's betrayal seriously. When the Other, Thanos' vizier, scolded Ronan for disrespecting the warlord, Ronan angrily broke the Other's neck, killing him and forcing Thanos to speak to Ronan directly. Undaunted by Ronan's complaints, Thanos waved the Kree away, and while Gamora's betrayal was an issue, Thanos entrusted both Ronan and Nebula with fixing that problem. As Ronan departed, Thanos grimly warned him that if he returned empty handed again, he would "bathe the starways" in his blood.

Behind the scenes

 * In the comics, Sanctuary was the name used for Thanos's space ark, first appearing in Warlock Vol 1 10. The Sanctuary, and its two duplicates, served as Thanos' base of operations in his plan of stellar genocide in an attempt to court Death. However, in Marvel Two-In-One Annual Vol 1 2, Thanos' plans were thwarted by the spirit of Adam Warlock, who turned the Titan into stone aboard one of Thanos' Sanctuary starships. Also, Thanos was never seen sitting on a space throne until Silver Surfer Vol 3 34.
 * During Avengers: Age of Ultron, Tony Stark's Scarlet Witch induced mirage, he see's his fellow teammates dead on the landscape of Sanctuary.