10. What was the date of Constantine's famous Sunday law?
a.d. 321.
11. When and by whom was the Council of Nice convened?
By the emperor Constantine, 325 a.d.
12. Under what authority were its decrees published?
“The decrees ... were published under the imperial authority, and thus obtained a political importance.”—Id., page 133.
13. What was one principal object in calling this council?
“The question relating to the observance of Easter, which was agitated in the time of Anicetus and Polycarp, and afterward in that of Victor, was still undecided. It was one of the principal reasons for convoking the Council of Nice, being the most important subject to be considered after the Arian controversy.”
“It appears that the churches of Syria and Mesopotamia continued to follow the custom of the Jews, and celebrated Easter on the fourteenth day of the moon, whether falling on Sunday or not. All the other churches observed that solemnity on Sunday only, namely; those of Rome, Italy, Africa, Lydia, Egypt, Spain, Gaul, and Britain; and all Greece, Asia, and Pontus.”—Boyle's “Historical View of the Council of Nice,” page 23, edition 1836.
14. How was the matter finally decided?