In Christian architecture the baptistry or baptistery (Latin baptisterium, from Greek βαπτίζειν) is the separate centrally-planned structure surrounding the baptismal font. The baptistry may be incorporated within the body of a church or cathedral and be provided with an altar as a chapel. In the early Church, the catechumens were instructed and the sacrament of baptism was administered in the baptistery.

The sacramental importance and sometimes architectural splendor of the baptistry reflect the importance of baptism to Christians. The octagonal plan of the Lateran Baptistery, the first structure expressly built as a baptistry, provided a widely-followed model, which might be twelve-sided, or even circular as at Pisa. In a narthex or anteroom the catechumens were instructed and made their confession of faith before baptism. The main interior space centered upon the baptismal font (piscina), in which those to be baptized were immersed thrice. Three steps led down to the floor of the font, and over it might be suspended a gold or silver dove. The iconography of frescos or mosaics on the walls were commonly of the scenes in the life of Saint John the Baptist. The font was at first always of stone, but latterly metals were often used.

Mark Alan Lowry (born June 24, 1958) is a Christian comedian, songwriter, and singer, best known for co-writing the song “Mary, Did You Know?”. Lowry performed with the Gaither Vocal Band from 1988–2001 and, in January 2009, he re-joined the group along with other "GVB" alumni Michael English and David Phelps. Lowry has recorded twelve albums, both music and comedy.

Lowry was born in Houston, Texas to Charles, an attorney, and Beverly Lowry. He often uses anecdotes of his young life in his comedy, as well as speaking of his experience with hyperactivity and Attention Deficit Disorder in his performances. Lowry is the self-described “Poster Boy for Hyperactivity

While attending Liberty Baptist College (now known as Liberty University), Lowry joined a college evangelistic team made of Charles Hughes and David Musselman and began singing. Lowry's comedy career inadvertently began from here. There would be an elongated pause in his singing performance while he waited for the soundtrack to be changed. Lowry began to fill this pause with a monologue. Lowry soon realized that the audiences at his performances were laughing not at him but at his monologues.