File talk:Raadhuis, Boskoop. Glas-in-lood ramen. Detail 02.jpg

@Agaath: If you know which William Count of Holland/Willem (...) van Holland is referred to in the inscription, maybe you could add the appropriate category? Or, maybe, the glass artist is also known? -- Martinus KE (talk) 19:04, 28 March 2021 (UTC)

@Martinus KE: I have found the right William I of Holland. The artist is possible Roelf Gerbrands. He made the windows near the stairwell. See Rijksmonumenten a monument description. Because I am not sure, I rather not add this category.--Agaath (talk) 22:21, 28 March 2021 (UTC)

I have changed the category because I found out that he was the father of Floris V van Holland. A window of him is also in Raadhuis Boskoop. File:Raadhuis, Boskoop. Glas-in-lood ramen. Detail 01.jpg and on File:Counts William II and Floris V of Holland.jpg we can see them both--Agaath (talk) 12:02, 29 March 2021 (UTC)