Seen here is the famous Saint James's Gate complex belonging to Guinness in Dublin.
I have written about silhouettes before, mostly from blue hour in landscapes, see here for instance; the silhouette is an important tool for any photographer, even in landscapes.
To join Panoramic Ireland and learn more about how to make better images, using silhouettes or long exposures - join me on a photography workshop in Ireland, use the contact form to enquire.