Create a painting of a black cat silhouette perched on a distant rooftop gazing up at a large, full, green moon casting an eerie green glow over a medieval cityscape with pointed roofs and chimneys. The atmosphere is dark and mysterious, with a sense of wonder and the unknown. The cat's silhouette is sharp against the bright moonlight, adding to the intrigue. Include subtle details like twinkling stars, distant church spires, and the faint glow of lights from windows, with a painterly quality, soft edges, and a focus on the interplay of light and shadow.