Novosibirsk is a Russian city on the Ob River in the southeastern part of the West Siberian Plain. Thanks to the construction of the Trans-Siberian Railway since the XIX century, the city has constantly grown and developed. This is reminiscent of the first railway bridge across the Ob river, which still exists today. In the center of Novosibirsk the nineteenth-century cathedral in the name of Alexander Nevsky with golden domes in Byzantine style rises. Nearby there is the Opera and Ballet Theater on Lenin Square. The city is densely populated and the number of inhabitants is 1.5 million people.