Answer:
- Admiralty building in St. Petersburg: The Admiralty is a major historical building and a symbol of St. Petersburg, founded by Peter the Great as a shipyard and naval base. It played a crucial role in the development of the Russian Navy and the city's maritime power.
- Medal "For the Defense of Leningrad": This medal commemorates the heroic defense of Leningrad (now St. Petersburg) during World War II. The Admiralty, as a prominent landmark of Leningrad, was naturally included in the imagery associated with the city's defense.
- Absence of Admiralty in Moscow: Moscow, while the capital of Russia, is not a port city and historically did not have a significant naval presence. Therefore, an "Admiralty" in the same sense as in St. Petersburg would not exist there.
Why there is no Admiralty in Moscow: Moscow is an inland city and its historical development was not tied to naval power and shipbuilding in the same way as St. Petersburg. St. Petersburg was specifically founded as Russia's "window to Europe" and its main naval base.
Conclusion: The Admiralty is intrinsically linked to St. Petersburg's history as a maritime capital. Its absence in Moscow is due to Moscow's geographical location and historical role, which did not necessitate the establishment of such an institution.