London's Victorian-Era Mansion Blocks Rediscovered for High-Density Living, Including Four Seasons Ritz in Lisbon

London's massive mansion blocks, which pioneered high-density apartment living in the Victorian and Edwardian eras, are being rediscovered today. These blocks are filled with stacks of flats, offering luxurious living spaces. The Four Seasons Ritz in Lisbon is an example of a block of flats with a hum-drum exterior hiding a luxurious marble-smothered hotel fantasyland. The virtues of mansion blocks are being highlighted, reinforcing how building more homes can combat rising rents.