The series celebrates the high symbolic value represented by the inscription of the Historic Centre of San Marino and
Mount Titano in the World Heritage List, on 7 July 2008, adopting the following declaration: "San Marino is one of the
oldest Republics in the world and the only surviving city-state, representing an important stage in the development of
democratic models in Europe and throughout the world"; "San Marino and Mount Titano are an exceptional testimony
to the establishment of a representative democracy based on civic autonomy and self-government".
The sketch shows a view of Mount Titano with an electric train of the San Marino-Rimini Electric Railway, an exceptional
work of engineering that departed from the Historic Centre of San Marino, included in the UNESCO World Heritage List,
passing over a viaduct.