The Vatican’s former ambassador to the Dominican Republic has been convicted by a church tribunal of sex abuse and has been defrocked, the first such sentence handed down against a top papal representative.

The Vatican said Friday that Archbishop Jozef Wesolowski was found guilty by the Vatican’s Congregation for the Doctrine of the Faith in recent days and sentenced to the harshest penalty possible against a cleric under canon law: laicization, meaning he can no longer perform priestly duties or present himself as a priest.