During the performed literary research, the common attributes united under the geography category were area, population, proximity to sea and the presence of canals. The history category covered age, trade development, architecture, the presence of bridges and the celebration of Venetian holidays such as Carnival. Since not all of those attributes are equally important, appropriate weights were assigned to each of them. The general formula for the VI established is represented in figure 1 below.
Тhe attribute selected to have the greatest importance and hence, the highest weight wa=3, was trade development. Venice’s location on the Adriatic sea and its monopoly over the salt trade turned it into a wealthy commercial hub up until the Ottoman’s conquest of Constantinople and the Portuguese voyages to Asia (Wikipedia, 2015). Many of the “Venetian Replicas” located in proximity to the sea, were also developed as big trade centers and shared a similar historical development with Venice.
The architecture, the proximity to a sea and the age of the city were given a weight of wa=2. The Venetian Gothic style is specifically unique to both Italy and Europe. However, all cities which have preserved their medieval look were awarded one point for architecture. The “Venetian replicas” positioned close to the sea were granted one point for proximity. The ones founded before the X century AD were given one point for age. The rest of the attributes (area, population, bridges, canals, and Carnival) were assigned a weight of wa=1.
Following these criteria, the maximum score on the Venetian Index was set to 14 points: 5 for geography and 9 for history. Principal component analysis was performed on each of the replicas to determine which city and in which categories resembles Venice the most.