Sacrum lumbar vertebra, and its lower part with the coccyx (tailbone) via the sacral and coccygeal cornua. The sacrum has three different surfaces which are shaped to accommodate surrounding pelvic structures. Overall it is concave (curved upon itself). The base of the sacrum, the broadest and uppermost part, is tilted forward as the sacral promontory internally. The central part is curved outward toward the posterior, allowing greater room for the pelvic cavity. In all other quadrupedal vertebrates, the pelvic vertebrae undergo a similar developmental process to form a sacrum in the adult, even while the bony tail (caudal) vertebrae remain unfused.
Annum sacrum Annum sacrum Annum sacrum (meaning Holy Year) is an encyclical by Pope Leo XIII on the consecration of the entire world to the Sacred Heart of Jesus. It was delivered in Saint Peter's Basilica in Rome on the 25th day of May, 1899, the twenty-second year of his pontificate. "Annum sacrum" was published on 25 May 1899, in anticipation of the Holy Year declared for 1900 to usher in the twentieth century. When the Church, in the days immediately succeeding her institution, was oppressed beneath the yoke of the Caesars, a young Emperor saw in the heavens across, which became