This contribution contains a brief interpretation of the national landscape conservation development during the First Czechoslovak Republic in Slovakia. The fist legislative Decree on preservation of (natural) monuments was enacted by the Minister of the Czechoslovak Republic with full administrative powers of Slovakia, Dr. Vavro Šrobár; with accompanying formation of the Governmental Commissariat, later the National Department to Preserve Monuments in Slovakia. Dr. Jan Hofman was the designated founder of national nature conservation in Slovakia and he later became the long-term manager of the Governmental Commissariat and National Department. Many initial steps were taken to advance nature conservation in Slovakia during the work of this national institution. These included building preserved area networks; with special area preservation, the inception of specifi preservation and construction of a network of regional conservators and other conservancy activities.