Nature conservation 2013 limestone area, catalog no. 773-776-4 First Day Covers, Czechoslovakia

The entire collection is completed with four decorative fields depicting animals and plants that are represented in the Karlstein region. The Karlstein Nature Reserve was founded in 1955. Warm-loving fauna, typical of the Mediterranean region, can be found in the nature reserve. Such species grow here that we cannot find anywhere else in the Czech Republic. The biggest attraction of the area, however, is the medieval Karlstein Castle, the foundation stone was laid in 1348 by King Charles IV.

The postage stamps on the first day covers show:

10 Kr. - Austrian dragon head and steppe grasshopper
14 Kr. - Stone dresser
18 Kr. - Silver green ; ner Bl & auml; uling, Wandergelbling and meadow pasque flower
20 Kr. Karlstein Castle and vinegar rose