A two-member crew from Bovard Studio in Iowa has been working the past several weeks to remove protective plastic sheets that have hung outside the windows for more than 30 years. Heath Nevins and Nick De Ruiter have then been cleaning and restoring the windows, designed by the famed Mayer family of Munich, Germany, and the first of which were placed in the church in 1911. They're using a process known as "releading," referring to the lead material that holds the stained glass pieces in place.