Last weekend, a tourist recorded the collapse of the barbican tower of the Castle of Escalona, in Toledo, declared a Site of Cultural Interest. The wall fell down in seconds, adding to the collapse of another tower at the Castle of Almonacid de Toledo just a few weeks ago. Two medieval fortresses, two collapses, one same pattern of neglect.
Drones and sensors: the technology that doesn't arrive in time 🏚️
While the stones fall, the technology to monitor historical structures exists and is not expensive. Inclination sensors, drones with thermal cameras, and 3D models through photogrammetry allow cracks to be detected before they become catastrophic. Low-cost sensors can be installed that alert in real time to millimeter movements. But without political will or budget allocations, the sensors rust in storage.
The tourist who filmed the collapse: the new heritage conservator 📱
In the end, the one who documents the heritage is not the architect or the cultural technician, but the tourist with a mobile phone. If we want to preserve castles, perhaps we should give an official position to the first visitor who arrives with a full battery. At least he records for free, does not request reports, and uploads the video before the plaster has finished cooling. That said, he should not forget to activate HDR.