Which interior designer opened the first full-service interior decorating firm in 1924?

The opening of the first full-service interior decorating firm in 1924 is attributed to Dorothy Draper. She was a pioneering figure in the field of interior design and is well-known for her distinctive style that combined bold colors and patterns with a sense of luxury and comfort. Draper's approach to interior decorating revolutionized the industry and set a new standard for decorating that emphasized elegance and livability in domestic spaces.

Her firm established comprehensive services, allowing clients to not only receive decorating advice but also to procure furnishings and accessories, significantly changing how interior design services were delivered and perceived. Draper's influence is still felt today, as she continues to inspire modern designers with her innovative and often playful design philosophy.