Claim: Mexico–Portugal relations refers to the diplomatic relations opened Lisbon and in Mexico City which first took place in 1843 and established officially on 20 October 1864.
Evidence: Mexico–Portugal relations refers to the diplomatic relations between Mexico and Portugal. The first official diplomatic contacts between Mexico and Portugal took place in 1843 in when ambassadors of both nations met in Washington, D.C.. Diplomatic relations were not established officially until 20 October 1864 under the government of Emperor Maximilian I of Mexico.