proverb/ˌno se ɡaˌno θaˌmoɾa en ˌuna ˈoɾa/
Rome wasn't built in a day (it takes a long time to do something complicated or impressive)
Synonyms: Roma no se hizo en un día
Literally, “Zamora wasn't won in an hour”. In reference to Sancho II who unsuccessfully tried to conquer this Spanish city in 1072 during seven months.