palacio
/pəˈlasɪəʊ/noun
In Spain and Spanish-speaking countries: a palace; the country seat of a count, duke, etc.; an important official building; specifically (frequently in form Palacio) (a) the official residence of the former Spanish and Mexican governors of Santa Fe, New Mexico; (b) the royal hunting lodge of the Spanish kings in the Coto Doñana, Seville.
Origin
Mid 19th century; earliest use found in The Southern Literary Messenger. From Spanish palacio palace.