Most home renovations don’t require trips to New York’s MoMA to look at original construction plans. But when you are working on one of architect Ludwig Mies van der Rohe’s best preserved buildings no stone is left unturned. In March, his Tugendhat Villa in Brno, Czech Republic, reopened after an $8.8 million, two-year reconstruction. Using family photographs, archival material, visiting Mies’ other buildings in the U.S. and Europe, the Tugendhat redesign team focused on, as Villa Director Iveta Cerna said “identifying authenticity.”