What features do both the figures and the backdrop of the mosaics in the rotunda of St. George possess?

Sergei Diaghilev was the remarkable impresario of the ________

a. Ballets Russes b. Evenings of Contemporary Music c. Triple Entente d. Mariinsky Theater

Schumann's brief career was nonetheless varied, including all of the following achievements except

A. he was a brilliant and well-known concert pianist. B. he wrote a total of four symphonies. C. he founded an influential journal of music criticism. D. he wrote several highly regarded song cycles.