Did you know?
The Filioque & Per Filium as Orthodox Dogma was decreed by the Ecumenical Councils of Ephesus, Constantinople II, and Nicaea II and also other synods by means of solemn magisterium.
See video playlist to learn more:
https://www.youtube.com/playlist?list=PL7wE5wXqB8ontWEi1guI0sMN1P5VIrssb