Embassy (noun)

1. The official residence or offices of an ambassador.
2. A diplomatic mission headed by an ambassador.

Origin:

From middle french ambassade, from old french ambassade, from latin ambactus ("servitor, messenger"), from ambactus, past participle of ambaciō ("i go about, go on an errand"), from amb- ("around") + -aciō ("action"), from old french ambassat, from ambassadeur ("envoy"), from latin ambactus ("servitor, messenger").

Examples:

1. He was appointed to the embassy in London.
2. She visited the embassy to renew her passport.
3. The embassy organized a reception for the visiting dignitaries.
4. The embassy provides assistance to citizens of the country abroad.
5. He was the ambassador at the embassy.