Cemeteries are mostly perceived as undisturbed places where we can remember the deceased loved ones. From another perspective, they also represent historical and cultural values throughout the world. It has only recently been demonstrated that cemeteries are home to signifcant natural values, of which we have very little knowledge in general, and this applies to the entire world. During the past few decades there have been no studies that quantifed the nature conservation value of cemeteries at either local or regional scales within the landscape of the countryside. We also hardly know, for example, which natural and cultural factors determine or influence the survival of various natural values within the area of cemeteries. Te concept of conducting a thematic scientifc survey on the flora of cemeteries was formulated by the editor of this book during a feld trip to Turkey in 2013. Later, this topic became the subject of the second author’s doctoral thesis. Tis book is therefore a result of the work of the master and the disciple. During the course of the last few years, together with our colleagues we have visited more than 2800 cemeteries in 17 countries. During our work, it became obvious that the conservation of cultural-ethnographic values of cemeteries (the traditional burial habits, the presence of traditional gravestones and headboards) are closely linked with the survival of natural values within the territory of cemeteries. By publishing this book, we are willing to achieve two goals. On the one hand, we hope (even if with a very low impact) to contribute to the survival of at least the most valuable cemeteries. Achieving this goal is unimaginable without informing the cemetery management organizations (local governments, churches) and the local population. On the other hand, we aim to report on our current knowledge and on the results of our systematic documentation of the biodiversity in cemeteries of Europe and Asia Minor. We support, and encourage the conservation of old cemeteries along with old burial traditions practised for centuries. We believe that this is essential not only for the sake of respecting our ancestors and our past, but it would also make a signifcant contribution to conserving cultural and natural values for the future.