(from the article `stage design`) ...the crowd`s taste for realism and sensation, legions of spectacularly dressed soldiers were introduced to the tragedies. Costumes for tragedy were ... Found on http://www.britannica.com/eb/a-z/c/148
A cothurnus was a boot or buskin worn by the ancient Greek and Roman actors in tragedies. It reached half way up the leg, sometimes almost to the knees, and had a very thick sole for the purpose of increasing the apparent stature of the performer. The actors in comedies wore a thin slipper called soccus, and hence cothurnus and soccus were employed... Found on http://www.probertencyclopaedia.com/browse/PC.HTM