Sign at the entrance of Rijksmonument Abtstraat 4 in Maastricht, Netherlands. The building was briefly used as an office of Envida around 2015. At that time it was named after Doctor Lambert van Kleef (1846-1928), who was a famous surgeon at Calvariënberg Hospital from 1881 until 1904.
<a href="//commons.wikimedia.org/wiki/User:Kleon3" title="User:Kleon3">Kleon3</a>
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<span class="int-own-work" lang="en">Own work</span>