Factory entrance of Boehringer Ingelheim, around 1890
Boehringer Ingelheim (boehringer-ingelheim.com)
CC BY-SA 4.0
<a rel="nofollow" class="external free" href="https://mediapool.boehringer-ingelheim.com/index.php/detail?assetId=2590">https://mediapool.boehringer-ingelheim.com/index.php/detail?assetId=2590</a>