Penthouse 5208 -- A Rare Sky-High Sanctuary in the Heart of Montreal Perched on the 52th floor of 1 Square Phillips, the tallest residential tower in Montreal, Penthouse 5905 is an exclusive residence offering unparalleled panoramic views. From this elevated vantage point, enjoy breathtaking landmark views, including Mont Royal, the St. Lawrence River opening up to the seaside, and the shimmering city skyline. This spacious penthouse providing an open-air retreat high above the city.