Heathenry, also termed Heathenism, contemporary Germanic Paganism, or Germanic Neopaganism, is a modern Pagan religion. Scholars of religious studies classify it as a new religious movement. Developed in Europe during the early 20th century, its practitioners model it on the pre-Christian religions adhered to by the Germanic peoples of the Iron Age and Early Middle Ages. In an attempt to reconstruct these past belief systems, Heathenry uses surviving historical, archaeological, and folkloric evidence as a basis, although approaches to this material vary considerably.

Modern paganism, also known as contemporary paganism and neopaganism, is a type of religion or family of religions influenced by the various historical pre-Christian beliefs of pre-modern peoples in Europe and adjacent areas of North Africa and the Near East. Although they share similarities, contemporary pagan movements are diverse and as a result, they do not share a single set of beliefs, practices, or texts. Scholars of religion often characterise these traditions as new religious movements. Some academics who study the phenomenon treat it as a movement that is divided into different religions while others characterize it as a single religion of which different pagan faiths are denominations.