St Giles' contains almost two hundred memorials honouring distinguished Scots and remembering Scottish soldiers. Most of these memorials date from the 19th century and early 20th century.
St Giles' also has a notable collection of stained glass windows. They date from the 1870s onwards and show a broad range of traditional and contemporary styles.
St Giles' is built in the Gothic style, basically 15thc with many alterations. The most notable external feature is the Crown Spire on the tower.