Throughout the last several decades. The Catholic Church has made huge strides towards healing old wounds with our Orthodox brethren. These include theological clarifications as well as political reunions.
These moves are commendable, as they decreased the divide between the Orthodox and the Catholics. The residue of these moves though, are quite interesting. As they put the Eastern Catholic churches in a very unique position.
A few centuries before dialogue with the Orthodox, factions of these same Orthodox churches came into communion with Rome. They are today called the Eastern Catholic Churches. Many of these Eastern Catholic Churches joined and accepted Catholic theological terminology (although did not use them).