The renovation budget of this 1960s condo in Houston, Texas was all spent on taking things out. The raw concrete of the floors and walls makes an interesting setting for modern design and works of minimal artists, which the owner Barbara Hill began selling more than 30 years ago. Hill has lived in many different styles but minimalism is where her heart is. In the 1970s she turned her Houston house into a gallery and represented artists such as Daniel Buren and Sol LeWitt early in their careers. Photos from Dwell.