Complex sentence: Pope Gelasius I (492-496) declared the "De laudibus Christi" an apocryphal; therefore, even though the poem was not considered heretical, its public reading was forbidden.
Split into simpler sentences: Pope Gelasius I (492-496) declared the "De laudibus Christi" an apocryphal. This meant that though the poem was not considered heretical, its public reading was forbidden.