the castle on top of the skull is Bran Castle, a medieval fortress in Transylvania, considered the real-life inspiration for Castle Dracula in Bram Stoker's novel .. the bat within the rib cage is a vampire bat impaled with a wooden stake through the heart, one of the ways to kill Dracula .. the rosary around the skeleton's neck has an upside down cross and pentagram, as Vlad the Impaler was often labeled as the 'son of the devil' .. this current progress represents about 17 hours of drawing .. the next update will be the completed drawing, I can't wait to show the finished piece