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<p>[QUOTE=&quot;Any Jewelry, post: 1150240, member: 2844&quot;]It could be 17th century Dutch or Low Countries. By the 17th century they could achieve an amazing clarity in glass.</p><p><br /></p><p>That is typical of antique glass for this kind of work, it is different from crown glass, which was used for smaller windows, like you see in houses on old paintings. At least here in the Netherlands, but I suspect it was the same elsewhere in Western and Central Europe. Crown glass has concentric circles in the centre.</p><p><br /></p><p>It is painted (stained) on one side, before it is heated in a furnace. On the outside of the church etc is the unpainted side, but the inside, painted side is still subjected to all sorts of chemicals.</p><p><br /></p><p>16th century church window, in Gouda, the Netherlands:</p><p><br /></p><p><img src="https://upload.wikimedia.org/wikipedia/commons/thumb/4/4e/Glas_in_lood_-_Jona_en_de_walvis.jpg/800px-Glas_in_lood_-_Jona_en_de_walvis.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" />[/QUOTE]</p><p><br /></p>

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