This man had Henry Holland refurbish Carlton House for him, and later in his life, he had the lavish Brighton Pavillion built. Almost bankrupt by an exorbitant lifestyle, he was only aided by Parliament after he gave up his relationship with the Catholic Maria Fitzherbert. After the birth of his daughter Charlotte, Princess of Wales, he effectively separated from Caroline of Brunswick, whom he targeted with the Bill of Pains and Penalties. Several times, he stood in for his father, who was suffering from porphyria. For 
This man had Henry Holland refurbish Carlton House for him, and later in his life, he had the lavish Brighton Pavillion built. Almost bankrupt by an exorbitant lifestyle, he was only aided by Parliament after he gave up his relationship with the Catholic Maria Fitzherbert. After the birth of his daughter Charlotte, Princess of Wales, he effectively separated from Caroline of Brunswick, whom he targeted with the Bill of Pains and Penalties. Several times, he stood in for his father, who was suffering from porphyria. For 10 points, who was this prince-regent, brother and predecessor of William IV, the last of four consecutive kings with the same name?
This man had Henry Holland refurbish Carlton House for him, and later in his life, he had the lavish Brighton Pavillion built.
George IV [or George Augustus Frederick]