Final answer:
The architects of the Palace of Westminster were Charles Barry and Augustus Pugin. While Barry was in charge of the overall design and construction, Pugin contributed significantly to the Gothic Revival detailing, especially in the interior. They created one of the most iconic examples of 19th-century Gothic Revival architecture.
Step-by-step explanation:
The architects responsible for the design of the Palace of Westminster were Charles Barry and Augustus Pugin. Charles Barry won the competition to rebuild the Palace after the fire in 1834, and he was the architect responsible for the overall design and construction. However, it is often noted that A.W.N. Pugin was the genius behind the Gothic Revival detailing, particularly evident in the interiors of the Palace.
Augustus Pugin was a prominent advocate for the Gothic Revival in architecture and he had a major influence on its adoption in 19th-century England. Not only did he design the interiors of the Palace of Westminster, but he also designed many churches throughout the country and wrote influential books on Gothic architecture that helped spread the style.