I'm sitting near the pillar where Chopin's heart is entombed.
The place is marked by a commemorative plaque in the bottom,
where the flowers are.
Chopin moved to Paris in 1830 and is buried in the Pere Lachaise
cemetery but at his own request the urn with his heart was brought
to Warsaw by his sister Ludwika.

Chopin's heart, like many other monuments important for Poles,
was removed during WWII and hidden so it survived the war damages
to the church. It came back to original place as soon as the church
was rebuilt in 1945-1953