On the cover: An icon from the Mégalo Metéoron Monastery in Greece depicts the First Council of Nicaea in A.D. 325. This year marks the 1,700th anniversary of the council, which solved a tricky doctrinal dispute and kept the early Church from falling apart. On Page 10, contributing editor Mike Aquilina explains the milestone meeting that Pope Leo XIV hopes to commemorate with a visit to Turkey this year.