(S (S (PP (IN During) (BASENP (PRPD his) (NN government))) (S (BASENP (DT the) (JJ Christian) (NN religion)) (VP (VP (VBD became) (NP (BASENP (DT the) (JJ official) (NN religion)) (PP (IN of) (BASENP (DT the) (JJ Roman) (NNP Empire))))) (PP (IN under) (NP (BASENP (DT the) (NN rule)) (PP (IN of) (BASENP (NNP Constantine) (DT the) (NNP Great)))))))) (PERIOD .))