Historical buildings provide us with insights into the essence of time periods that have already evaporated and can no longer be experienced in other ways. But how authentic are these relics, and what does this question actually mean? By examining this highly relevant concept - authenticity - the book illustrates how significantly the works of the past and our understanding of them change, and how unstable our language is when we communicate about it. "Shimmering Blurriness" connects intriguing philosophical thoughts with concrete observations and presents a new perspective on our understanding of the past. Detailed case studies revise common notions regarding the truth and authenticity of our cultural heritage.