I think the nun symbolizes martyrdom.
The four female figures on each corner represent Abnegation, Pain, Heroism and Martyrdom.
The faces went all around. May 17 is the Day of the Firefighter in Cuba. There's a procession that comes to pay respect every year…
The Mausoleum of the Firemen was built to commemorate the 28 firemen who died when a hardware shop in La Habana Vieja caught fire…