Despite Rubinstein's outburst of indignation, of course, Tchaikovsky was awarded the Great Silver Medal. But with regard to the diploma, he kept his word - and Tchaikovsky received his diploma only almost five years later, when Nikolai Zaremba became the head of the conservatory after Rubinstein.
On January 6, 1866, Tchaikovsky arrived to Moscow. Just think! - just a week ago, at the ceremonial graduation party in St. Petersburg, toasts were made to the prosperity of the Russian music, and even to the unopened Moscow Conservatory! Together with all was wishing success its future professor, whose name the conservatory would later bear.
The Moscow branch of the Russian Musical Society was headed by Anton Rubinstein's brother of Nikolai, and he was looking for teachers for the Moscow conservatory. He already knew about Tchaikovsky, but he asked the opinions of his brother and Professor Zaremba. Both of them unanimously advised to take another graduate instead of Tchaikovsky - G. Kross! .. However, Nikolai Rubinstein nevertheless decided to meet the candidates in person - and Pyotr "made a wonderful impression on him with whole soul."
Opening the Moscow Conservatory, Nikolai Rubinstein defined its goal in a few words: "To raise the significance of the Russian music and the Russian artists."
The style of the cultural and musical life of Moscow was more democratic than that of St. Petersburg, if only because there was no court in Moscow with all its courtiers. Young people occupied an important place in this conditions; before the opening of the conservatory, all kinds of amateur musical circles flourished; in a short period of time, the music publishing house of P. Jurgenson and the concert organization were created. Nikolai Rubinshtein rallied all Moscow musical forces; it seemed that no aspect of musical life was forgotten.
Tchaikovsky was at the center of this life, the conservatory needed him. He taught harmony, instrumentation and free composition. He taught harmony according to his own method, and in 1872 the "Guide to the Practical Study of Harmony" was published, compiled by Tchaikovsky and reprinted eight times. This was the first Russian textbook of harmony.
Tchaikovsky's remarks, explanations and corrections to the work of his students were clear, concise and simple.