Johanneum Harthau is a built from Harthauer Granit. This picture is a 3D ADA Dimensionsmalerei- Picture from Benita Martin
<a href="//commons.wikimedia.org/wiki/User:Dr.BenitaMartin" title="User:Dr.BenitaMartin">Dr.BenitaMartin</a>
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<span class="int-own-work" lang="en">Own work</span>