 The font is hexagonal and executed in white marble with a bronze portrait relief by MacGill; the bowl is a trough surrounding a bronze sculpture of a mother and child, based on Michelangelo's "Madonna of Bruges".Armstrong based the font's design on Jacopo della Quercia's font of Siena Cathedral.At its installation, the sculpture divided those who praised its aesthetic qualities and those who believed a Madonna to be inappropriate in a Presbyterian church.