There are currently around 35,000 buildings under a preservation order in Austria and a further 30,000 are classified as "sensitive", but on average conservation is only carried out on 220 of those sites every year due to constraints on financial and human resources.

"If it carries on like this, it will take 130 years until all sites are actually under protection," explains Markus Landerer from Initiative Denkmalschutz (Conservation Initiative). 

http://www.thelocal.at/20150504/activists-petition-culture-minister-to-save-austrias-heritage