His only artistic inclination was choral singing , and he formed an amateur chorus of more than sixty voices , including some professional singers .
Grand Duke Sergei Mikhailovich was , unlike his brothers , interested in mathematics and physics , which coincided with his fondness for artillery .
Sergei Mikhailovich 's only artistic inclination was choral singing , and he formed an amateur chorus of more than sixty voices , including some professional singers .
Grand Duke Sergei Mikhailovich was , unlike his brothers , interested in mathematics and physics , which coincided with his fondness for artillery .