Introduction to Christianity Introduction to Christianity Introduction to Christianity () is a 1968 book written by Joseph Ratzinger (Pope Emeritus Benedict XVI). Considered one of his most important and widely read books, it presents a "narrative Christology" that demonstrates the place for faith is in the Church. The book offers a "remarkable elucidation of the Apostle's Creed" and gives an "excellent, modern interpretation of the foundations of Christianity". Originally published in German in 1968 under the title, "Einführung in das Christentum", Ratzinger restates the Apostles' Creed and the meaning of this foundational text in language that has a greater contemporary resonance than the
8661 Ratzinger months (1,903 days). Its orbit has an eccentricity of 0.03 and an inclination of 11° with respect to the ecliptic. In October 1969, it was first identified as at Crimea–Nauchnij. The body's observation arc begins at Leoncito in 1974, when it was identified as , 16 years prior to its official discovery observation at Tautenburg. According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, "Ratzinger" measures 13.4 kilometers in diameter and its surface has an albedo of 0.09, while a generic estimate based on its absolute magnitude of 12.3 and a typical