Outline of Vatican City
Vatican City – an ecclesiastical or sacerdotal-monarchical state, being the sovereign territory of the Holy See and ruled by the Bishop of Rome—the Pope, the leader of the worldwide Catholic Church. The territory of this landlocked sovereign city-state consists of a walled enclave within the city of Rome, Italy. It has an area of approximately , and a population of just over 800. This makes Vatican City the smallest independent state in the world by both area and population.Geography of Vatican CityVatican City is an enclave in an urban area, and lacks the geographic features common to (much larger) countries:Demographics of Vatican City
Rail transport in Vatican City
The Vatican City State Railway branches off from the Rome to Viterbo railway line at the Roma San Pietro railway station and crosses Gelsomino valley via a 143.12 metre long masonry viaduct of eight 15.30 metre arches (bearing the Fasces and the Savoy Coat of Arms), which crosses Viale Vaticano (which it interrupts) and Via Aurelia. The Via delle Cave and the Via del Gelsomino are also interrupted by the viaduct and thus merge with the Via Aurelia.
The single track section of the route up until the border was subsequently fitted with overhead electric line. The first 100 metres of overhead line is always supplied with 3000V DC, with the remainer of the distance only energerised as needed.