Project D This elegant 1920s apartment fuses modern comforts with classic design elements in restrained palette. View fullsize Interior architecture / design: wtp studios. Photo: Kristofer Johnsson. View fullsize Interior architecture / design: wtp studios. Photo: Kristofer Johnsson. View fullsize Interior architecture / design: wtp studios. Photo: Kristofer Johnsson. View fullsize Interior architecture / design: wtp studios. Photo: Kristofer Johnsson.