As usual, the moment I finished reading your post I started searching more on the Sovinec Castle. Built in the 14th century this castle truly deserves to be in the historical landmark that it is.

But what hurt me was the fact that the original structure had deteriorated not not just of natural causes but due to greed of a few small people. As @czechglobalhosts mentions, thankfully that was stopped by the Czech people.

I found a few pictures on the internet that if you carefully see shows the change in the structure over time. First is the Drawing of Sovinec Castle in 1848 (by FA Heber):

(By F. A. Heber (David Papají, Páni ze Sovince) [Public domain], via Wikimedia Commons)

Second is a recent photo:

(from https://grupabiwakowa.pl/hrad-sovinec/)

If you compare them we can see several changes that have occurred just in the past 170 years.