Piano Solo - Level 3 - Digital Download SKU: A0.1485421 By Calvin Mark. By Calvin Mark. Arranged by Calvin Mark. Classical,March,Romantic Period. Score. 5 pages. Calvin Mark #1062476. Published by Calvin Mark (A0.1485421). In the triumphant key of G major, Allegro Maestoso is meant to be a blend of many different kinds of feelings. Heroic, sorrowful, tender, and playful, this solo piano piece takes you on a miniature journey through many different keys before finally returning home to G.