The consequences of the Union of Kreva were felt more immediately in the grand duchy than in the Kingdom of Poland. The pagan religion of the Lithuanian elite was prohibited. The sacred groves were felled. The pagan priests and vestal virgins were banished, and mass Christian baptisms were enacted in the River Vilnya on the orders of the now Catholic monarch. Henceforth, Roman Catholicism became the official religion of court circles in Vilnius, and increasingly of the more ambitious nobles.
