The cathedral was built in the early 20th century and is famous for its stained glass windows. To manufacture these windows the medieval technique of making stained glass had to be revived.
In his book 'Bryn Athyn Cathedral: The Building of a Church' published in 1971, Bruce Glenn describes the making of the stained glass. The book also features a photo of Donald assembling a stained glass window. While the book does not mention Donald's name, the link is made by a member of the New Church congregation. He personally knew Donald and has published some memories of Donald alongside some other 'wise and happy thoughts'. 