#Россійская Имперія

Prior to the events leading up to, culminating in, and emerging from the Russian Revolutions, the Russian Empire was at one time the third largest empire in the history of the world - and of course, on the other side of Communism, the Russian Federation is the largest country in the world by area, by a considerable amount.  This stamp enthusiast, Russian and Eurasian Studies minor, has grad plans to visit St. P in 2021 - С божьей помощью!

Stamp details:
Top left:
Issued on: December 10, 1957
From: Saint Petersburg, Russian Empire
MC #1

Top middle:
Issued on: March 14, 1917
From: Saint Petersburg, Russian Empire
MC #81

Top right:
Issued on: January 10, 1992
From: Moscow, Russian Federation
MC #220

Stamps on bottom:
Issued on: March 2, 2017
From: Moscow, Russian Federation
MC #BL240

Recognized as a sovereign state by the UN: Yes (since October 24, 1945)
Official name: Russian Federation; Росси́йская Федера́ция
Member of the Universal Postal Union: Yes (since July 1, 1875)