The foundation Pro Oriente was founded in 1964 by the Viennese

Vienna

Vienna is the capital and largest city of the Republic of Austria and one of the nine states of Austria. Vienna is Austria's primary city, with a population of about 1.723 million , and is by far the largest city in Austria, as well as its cultural, economic, and political centre...

 cardinal Franz König

Franz König

Franz König was an Austrian Cardinal of the Roman Catholic Church. He served as Archbishop of Vienna from 1956 to 1985, and was elevated to the cardinalate in 1958...

 to improve relationships between the Roman Catholic and the Eastern Orthodox

Eastern Orthodox Church

The Orthodox Church, officially called the Orthodox Catholic Church and commonly referred to as the Eastern Orthodox Church, is the second largest Christian denomination in the world, with an estimated 300 million adherents mainly in the countries of Belarus, Bulgaria, Cyprus, Georgia, Greece,...

 and Oriental Orthodox churches. The foundation was established during Second Vatican Council

Second Vatican Council

The Second Vatican Council addressed relations between the Roman Catholic Church and the modern world. It was the twenty-first Ecumenical Council of the Catholic Church and the second to be held at St. Peter's Basilica in the Vatican. It opened under Pope John XXIII on 11 October 1962 and closed...

 which opened the Catholic Church's doors to other religions with its ecumenism

Ecumenism

Ecumenism or oecumenism mainly refers to initiatives aimed at greater Christian unity or cooperation. It is used predominantly by and with reference to Christian denominations and Christian Churches separated by doctrine, history, and practice...

-decree "Unitatis Redintegratio". Pro Oriente has charters in Vienna

Vienna

Vienna is the capital and largest city of the Republic of Austria and one of the nine states of Austria. Vienna is Austria's primary city, with a population of about 1.723 million , and is by far the largest city in Austria, as well as its cultural, economic, and political centre...

, Graz

Graz

The more recent population figures do not give the whole picture as only people with principal residence status are counted and people with secondary residence status are not. Most of the people with secondary residence status in Graz are students...

, Salzburg

Salzburg

-Population development:In 1935, the population significantly increased when Salzburg absorbed adjacent municipalities. After World War II, numerous refugees found a new home in the city. New residential space was created for American soldiers of the postwar Occupation, and could be used for...

 and Linz

Linz

Linz is the third-largest city of Austria and capital of the state of Upper Austria . It is located in the north centre of Austria, approximately south of the Czech border, on both sides of the river Danube. The population of the city is , and that of the Greater Linz conurbation is about...

. Pro Oriente experienced a crisis in the year 1998 with the death of it leader and president of many years, Alfred Stirnemann.
.

In 1972 Pro Oriente established the Viennese Christological formula (Wiener Christologische Formel) as a mutual new interpretation of the Christology

Christology

Christology is the field of study within Christian theology which is primarily concerned with the nature and person of Jesus Christ as recorded in the Canonical gospels and the letters of the New Testament. Primary considerations include the relationship of Jesus' nature and person with the nature...

 of the Council of Chalcedon

Council of Chalcedon

The Council of Chalcedon was a church council held from 8 October to 1 November, 451 AD, at Chalcedon , on the Asian side of the Bosporus. The council marked a significant turning point in the Christological debates that led to the separation of the church of the Eastern Roman Empire in the 5th...

 held by the Oriental Orthodox and Roman Catholic churches. It was based on a recommendation by the Coptic Church in Vienna and is among the most important contributions of the foundation.

Vienna Christological Formula:

We believe that our Lord and Saviour, Jesus Christ, is God the Son Incarnate; perfect in his divinity and perfect in his humanity. His divinity was not separated from his humanity for a single moment, not for the twinkling of an eye. His humanity is one with his divinity without commixtion, without confusion, without division, without separation. We in our common faith in the one Lord Jesus Christ, regard his mystery inexhaustible and ineffable and for the human mind never fully comprehendible or expressible.”