 Complete the following phrase:  The Olympia closed its doors for a short period at the beginning of the First World War, while Oller, still the commercial property landlord, struggled ficially due to late rent payments and non-payments. Volterra partnered with Olympia chief conductor Raphael Beretta to manage stage shows, giving money to Oller, who expressly agreed-upon and Charles tet agency, then reopened the music hall one month after the First Battle of the Marne. By then, the revue became the preferred theatrical production choice, and ballet waned in popularity. In 1914, Charles left the Olympia and went to war; he was then wounded on the front lines of the 