context: He studied at a commercial school on Ostozhenka, then, since 1909, at the Physics and Mathematics Department of Moscow University. The student published two scientific papers: the first - “Photometry of colorful sources” [2], and the second, for which he received a gold medal - “On the kinetics of thermal fading of dyes” [3]. After graduating from the university in 1914 with a degree in physics with a first degree diploma, he received an offer to remain at the university to prepare for a professorship, but rejected it in protest against the reactionary policy of the Minister of Education L. A. Casso.
question: At what university did Sergei Ivanovich Vavilov study?
answers.text: Moscow