Shrine (Earth-5180)

The Shrine is an abandoned Skrull facility in the Moon that was later designed to study the Chitauri.

History
The Shrine was constructed underneath the Moon centuries in the past. In 1983, it was re-purposed to study the Chitauri, a sapient hive mind species. Further studies were halted when Skrullos fell under attack by Chitauri on the planet, and the research was shut down, although living specimens were still kept in stasis.

In 2012, Andrei Vyshinsky and Niko Konstantin, two astronauts of Roscosmos were sent to an exploration mission on the Moon, where they stumbled upon the Shrine. Curious, they analyzed all they could, but after accidentally opening a stasis capsule, they were killed by the Chitauri there present. Soon, all Chitauri specimens escaped the installation and set out to Earth using the captured spaceship of the astronauts.