Whenever I am in Prague, I make a point of visiting St Cyril and Methodius Cathedral. Inside the crypt in 1942 hid Jozef Gabčík and Jan Kubiš, the two Czech parachutists that carried out the assassination of Heydrich.
After After their hide out was discovered, they and fellow resistance fighters fought gallantly, holding off more than 700 German soldiers. There was only so long this resistance could continue, however. A truly moving place to visit.