During the controversy caused by the Origenists , Emperor Justinian declared that this hymn should be sung in all Christian Churches .
There is also a tradition that Emperor Justinian is the person responsible for the hymn 's spread and popularity .
During the controversy caused by the Origenists , person person declared that this hymn should be sung in all Christian Churches .
There is also a tradition that Emperor Justinian is the person responsible for the hymn 's spread and popularity .