The Reiss Chapel was a church in a village near the Reiss family estate, to the east of Orvud District. Above ground, it looked and functioned like any other church where the Reiss family would come to pray. Below the altar, hidden by a rug, was a stairway that led to a large underground cavern. The cavern below the chapel was created over a hundred years ago by the First King and contained hardened crystal walls that produced their own natural illumination. It served as the site where the succession ritual for the Founding Titan took place. This was done through a succession ceremony where the current wielder would be chained upon an altar. Another family member would inject themselves with a serum and transform into a mindless Titan so they could devour their predecessor. Afterward, the successor of the Founding Titan would inherit the memories of the Fritz family and become bound by the First King's will. Some time afterward, the chapel was built above it.