Complex sentence: Notwithstanding being protected, the machinery might disappear due to the need of modernization by the venue's current user, Het Toneelhuis; it was listed among the 7 Most Endangered sites of 2014 by Europa Nostra.
Split into simpler sentences: Notwithstanding being protected, the machinery might still disappear in the near future due to the need of modernization by the venue's current user, Het Toneelhuis. For this reason, it was listed among the 7 Most Endangered sites of 2014 by Europa Nostra.