From: US Department of Treasury 

Andrew W. Mellon (1921 - 1932) [was] one of the major figures in the industrial and financial development of the kans-Allegheny region, [he] was appointed Secretary of the Treasury by President Warren G. Harding in 1921, and he continued to serve under presidents Calvin Coolidge and Herbert Hoover. As the nation  embarked on the most materialistic period in its history, Mellon's philosophy was one of debt reduction, tax reduction, and a balanced budget.  
(ustreas.gov) 

Mellon was the father of Ailsa Mellon Bruce, whose 1926 portrait by de Laszlo is already 
posted on the site. He was Secretary of the  Treasury at the time the portrait was painted. It was de Laszlo's fourth portrait of him. 

 
Ailsa Mellon Bruce 
1926 
(daughter to Andrew W. Mellon) 
 

Notes 
 

• See more on Philip Alexius de Laszlo