However , by the time Giustiniani arrived , Lucaris had made a confession of faith which concerned Roman Church leadership .
Giustiniani was met by Atanasio Patelerio , a rival of Lucaris who claimed to have control of Constantinople and the Eastern Church .
However , by the time Giustiniani arrived , Lucaris had made a confession of faith which concerned Roman Church leadership and he was met by Atanasio Patelerio , a rival of Lucaris who claimed to have control of Constantinople and the Eastern Church .