Eight studies on the life and work of Marcus Marulus of Split (14501524) are assembled here under the title Catholic Advocate of the Evangelical Truth. They focus on what Marulus and Martin Luther have in common; on Maruluss Carmen, Christ Speaking from the Cross; on his metaphors for empires in his Latin works and in comparison with the contemporary German Humanist Ulrich von Hutten; on Maruluss open letter to the pope; on his reading of the four volumes of the illustrated Biblia Latina and samples of the marginalia which he entered; on his understanding of the Rock in Matthew 16:18; on the Tree of the Cross and other early Latin poetry; and on his view of Christian-Muslim relations.