In this task, you are given a question and a context passage. You have to answer the question based on the given passage.

What had been done to the twentieth century homes?, Context: The area is also known for its early twentieth century homes, many of which have been restored in recent decades. The area includes many California Bungalow and American Craftsman style homes, Spanish Colonial Revival Style architecture, Mediterranean Revival Style architecture, Mission Revival Style architecture, and many Storybook houses designed by Fresno architects, Hilliard, Taylor & Wheeler. The residential architecture of the Tower District contrasts with the newer areas of tract homes urban sprawl in north and east areas of Fresno.
restored