"His face is beautiful."

Translation: Το πρόσωπο του είναι όμορφο.

[Vassilis3]

«πρόσωπό του» double accent because of «του» or the rule is changed?

[troll1995]

The rule applies, it's a small mistake in the sentence.

[Gian.Paolo.Rm]

The second accent on πρόσωπό shoud definitly be added, I think.

[Dimitra956826]

The original sentence can't be changed now, unfortunately, but the alternative with the second accent is also accepted. ^.^