The Crooked bridges are all those crossings not built perpendicular to the banks. At the time of the Serenissima, transport by boat and water was privileged and the connections between pedestrian areas by bridges were considerably lower than today.
With the passage of time, the change of habits and the increasing importance of pedestrian traffic, it was decided to erect new bridges, first in wood and then with stone structures (the metal ones were placed in the last two centuries). At the time of construction, it was realized that some of these bridges joined alleys or opposite banks at points that were not perpendicular but often oblique. Hence the term crooked bridge.
The seven crooked bridges currently visible are located in Santissimi Filippo and Giacomo, in Sant’Aponal, in Santa Maria Maggiore, in San Martin, in Santa Maria del Giglio, in San Boldo and finally in San Marcuola.
However, the city has numerous oblique bridges that have not been called crooked bridge, assuming instead a name that takes the name of a personality or in relation to the place where they were created. It is probable that the choice fell on a different identification system, also to avoid creating confusion, considering the increasingly numerous construction of city bridges.
At first glance, the crooked bridge of San Marcuola might suggest an architect's whim: it seems that the physical space to erect it in parallel with the two banks is all there. However, on closer examination, the pavement shows that behind the Church of San Marcuola there was no land but a stream (Rio drio la Chiesa) which therefore forced the construction of an oblique bridge. The crooked bridge in San Marcuola is located halfway between the Venice Casinò and the Church of Santi Ermagora and Fortunato and connects a small square with Rio Terà drio the Church.