Observatory (noun)

1. A building or place equipped for observing astronomical phenomena.
2. An institution or organization concerned with the study of a particular subject.

Origin:

From latin observatorium, from observare "to observe".

Examples:

1. He worked at the observatory as an astronomer.
2. The observatory had several telescopes for observing the stars.
3. The observatory was located on top of a mountain for minimal light pollution.
4. The human rights observatory reported on the violations in the country.
5. The environmental observatory monitors the pollution levels in the area.