The Skyline Penthouse is one of the largest hotel accommodations in the City of London. Four Seasons Hotel London at Ten Trinity Square has unveiled its newest – and largest – residence, the Skyline Penthouse. Measuring almost 9,100 sq ft, the four-bedroom Skyline Penthouse is the largest of the hotel’s 35 residences, offering elevated luxury living for those in search of extended stays in the City of London.