Prompt
"Create a realistic image of the historic Greenwich Observatory building, situated in Greenwich, London, United Kingdom, showcasing its architectural grandeur as a prominent historic building, with a focus on its notable features such as the Airy Transit Circle and Shepherd Gate Clock, set against a clear sky with a subtle Prime Meridian line marking the spot, in a style that reflects its significance as a UNESCO World Heritage Site and a hub for astronomical research, navigation, and timekeeping."
