The architecture of St. George's Cathedral is remarkable for its tall spire, pillars, marble statues, mural tablets and memorials inside.

The British East India Company's Senior Engineer Col. James Lillyman Caldwell designed the church, and his assistant Captain De Havilland finished the construction.

On either side of the altar in vibrant colours are two panels describing two important events in the life of Jesus.

The left panel is a vivid depiction of the Baptism of Jesus by John the Baptist in the River Jordan.

Sunlight filters through these shining examples of medieval art, leaving the entire Cathedral bathed in rich, warm hues.

Associated with many schools, he is shown with an open Bible blessing an Indian boy in loin cloth, a sacred thread and a tuft.

One who ordained 151 clergymen is seen blessing two young priests attended by his son Archdeacon Dealtry, Lugard and Murphy.

There is a memorial tablet for the first Indian Bishop of Madras, David Chellappa (1955–1964) erected by the congregation of St. George's Cathedral.

Two other memorials for Indians are that of Dewan Bahadur N. Subrahmanyam (1841–1911)—Administrator General of Madras who founded and endowed the Kalyani Hospital and Dr. R. D. Paul who died in 1975 "after a long and devoted service to the Church, the State and the Community".

There is a tablet for Robert Caldwell, who for 53 years devoted himself to the furtherance of the Gospel among the Tamil people of Tirunelveli.

Similarly we see from a plaque that Edward Sell, Canon of St. George's Cathedral had worked for 67 years in Madras and died in 1932 at the age of 93.

In the Lady chapel there is a plaque in memory of Amelia, 21, who died in 1833, the only child of Sir Frederick Adam, Governor of Madras.

Other memorials exist for William Montague Douglas Home, second son of the Earl of Home, who died in 1822, Sir Joseph Henry Stone (1858–1941) Director of Public Instruction, Hitchcock of the Indian Police (1884–1926), Sir John Norton – Puisne Justice who was buried at sea on 20 September 1843, Thomas Moore Lane – Physician to the Nawab and Private Secretary to the Governor who died in 1844 and Thomas Parry who died at Porto Novo in 1824 after "a residence of 37 years at Madras with unblemished reputation".

[3] There is an interesting memorial of a woman feeding a snake in tribute to Dr. John Mack, Surgeon to the Governor's Bodyguard and Physician to the Nawab of Carnatic who died in 1852.

Tablets have been raised in memory of Major George Broadfoot of the 34th Madras Infantry who fought in the First Anglo-Afghan War and fell at the Battle of Ferozeshah in 1845, Major General Sir Robert Henry Dick – a hero of the Peninsular War who died at the Battle of Sobraon, Major John Frederick Graham who fell at the Battle of the Somme in 1916, Col. John Impett who served at Waterloo at the age of 15 and died as Sheriff of Madras in 1866, Lt. Col. James Drever who died "from the effects of a coup de soleil in China"[4] in 1842 and Lt. James Forsyth who died of cholera while on expedition to China in the same year.

The Community Welfare Centre, Leprosy Project, Sunday School, Youth, Women's, Men's and Teen Fellowships, Green Pastures, Prayer Groups, Gospel Teams, Quiz Programs, Bible Study Groups and the Home for the Aged have progressed well.