The High Altar, which has five crosses marked upon it, is of fine Italian marble, grained with blue and coral pink. A brass plate set into the left wall of the sanctuary has the following inscription indicating that the altar was a gift in memory of Richard Jacob de Mel given by, Mrs. C.E.A. Dias, his sister.
It was made in Italy and shipped to Sri Lanka. However, it was slightly disfigured by the stains incurred when it was left neglected on the building site during the erection of the Chapel. It was provided with a crucifix and six candle stands of carved brass, which were also of Italian design.
Rev’d Rebecca Mathew introduced the 2009 experimental Liturgy for Sri Lanka during her chaplaincy. Eventually, on Church of Ceylon Sunday 2013, Rev’d Marc Billimoria introduced the fully authorised Liturgy of Sri Lanka (2013) as well as the wooden Nave Altar that was dedicated by the Lord Bishop of Colombo for use in the Chapel every Sunday in keeping with the modern liturgical reforms in the worldwide Church. The High Altar is still used on the first Sundays and at liturgical events such as the Feast of the Transfiguration and the Festival of Nine Lessons and Carols. The Good Friday and Easter Liturgies together with the Choral Offices on special occasions are also special acts of worship in the Chapel.