The Moscow Sobor of 1666–1667 was a Pan-Orthodox Synod

Synod

A synod historically is a council of a church, usually convened to decide an issue of doctrine, administration or application. In modern usage, the word often refers to the governing body of a particular church, whether its members are meeting or not...

, convened by Russian Emperor Alexis, in Moscow

Moscow

Moscow is the capital, the most populous city, and the most populous federal subject of Russia. The city is a major political, economic, cultural, scientific, religious, financial, educational, and transportation centre of Russia and the continent...

.

It was led by Patriarch Païsius of Alexandria

Patriarch Paisius of Alexandria

-References:...

, and attended by Patriarchs of Antioch and Moscow, Metropolitans Athanasius of Iconium (representing the Ecumenical Patriarch), Ananias of Sinai (representing the Patriarch of Jerusalem), and several bishops and fathers.

One of the decisions in the synod was a specific ban on a number of depictions of God the Father

God the Father

God the Father is a gendered title given to God in many monotheistic religions, particularly patriarchal, Abrahamic ones. In Judaism, God is called Father because he is the creator, life-giver, law-giver, and protector...

 and the Holy Spirit

Holy Spirit

Holy Spirit is a term introduced in English translations of the Hebrew Bible, but understood differently in the main Abrahamic religions.While the general concept of a "Spirit" that permeates the cosmos has been used in various religions Holy Spirit is a term introduced in English translations of...

, which then also resulted in a whole range of other icons being placed on the forbidden list.