• The baptismal font 

      Bruggink, Donald J. (Western Theological Seminary (Holland, Michigan), 19)
      Entering St. Peter's one encounters the huge porphyry basin of the baptismal font, surmounted with its great gold covering.
    • Piazza del Quirinale 

      Bruggink, Donald J. (Western Theological Seminary (Holland, Michigan), 19)
      Pius the VII added the basin which until then was used as a cattle trough in the Roman forum.