Context: 

Recently, Russia accuses Ukraine of attacking the Kremlin in Moscow with drones overnight in a failed attempt to kill President Vladimir Putin.

About Kremlin:

• The word literally means “fortress inside a city”, and there are over 20 kremlins across Russia. 
• However, the most important and popular one is in Moscow, metonymically used to refer to Russian political authority, and has been the seat of political power in Russia since the 14th century.
• It is the official residence of the Russian President. 
• It is a historic site containing the relics of Russia’s czarist and communist past, and today serves as one of Moscow’s busiest tourist destinations.
• The Kremlin has been a UNESCO World Heritage Site since 1990.
• The Kremlin contains structures built at any time between the 15th and the 20th centuries. 
• It is a patchwork of different architectural styles, reflecting not just the aesthetics and technical capabilities of the time, but also the ideological and political bent of the ruling class.                                                                                                                                                    News Source: Indian Express