In Castello, a large and lively neighbourhood that partially borders Piazza San Marco, is the Sotoportego dei Preti, the area in which the home of Orio and Melusina is located. Orio was a fisherman who one day stumbled upon a mermaid, who had been entangled in his fishing net. The two fell in love instantly, so much so that she gave up her nature as an enchantress. They went to live in his house, but Melusina, who had been hit by a curse, made sure that every Saturday until the day of the wedding Orio did not return home, as she would turn into a terrifying snake. After the wedding, the young couple had three children, but the happiness soon faded, as Melusina fell ill and died. Orio, destroyed by grief, had to provide for his children, as well as tending to the housework but, to his amazement, every time he came home, he found everything arranged and clean. One day, due to a storm, he came home earlier than usual and found a snake in the kitchen. Terrified for the safety of his children, he killed it, since then the house was no longer tidied up and Orio therefore understood that slimy animal was none other than his beloved Melusina, who would never come back because of what he did. To commemorate a story of poignant love, where Orio and Melusina lived, a red brick heart was placed, which is said to bring good luck if it is touched with your loved one.