Alastair Auld Mactaggart OC AOE (March 11, 1928 – July 3, 2017), known as Sandy Mactaggart or Sandy Auld Mactaggart, was a Scottish-born Canadian educator and philanthropist. Mactaggart was born in Glasgow. After being evacuated to Canada during World War II in the late 1930s, he attended schooling at Lakefield College School (Ontario) and at Choate Rosemary Hall (Connecticut). He later attended Harvard University, studying architecture and graduating cum laude in 1950 with a Bachelor of Arts.