A few months ago we already took a glimpse at the altar apse of Sant'Andrea della Valle (St. Andrew in the valleys). Today we're again visiting this big Titular church with the second largest dome in Rome (after St. Peter's; 16.10 metres in diameter and 80 metres high). Three large paintings in the half-dome of the sanctuary depict the martyrdom of St. Andrew (if you want to know where the Cross of St. Andrew has it's name from: just look). They are executed by Mattia Preti, also known as Calabrese.
Even if I'm running into danger of repeating myself: I was there one hour before sunset and the only source of light (besides the windows in the cupola) were these glowers on the altar. I didn't know how much information was hidden in this photo before processing it. Without the possibilities of digital image processing getting an acceptable image of darker interiors would be a *very* painful task.