Once upon a time swam from the Atlantic to the Baltic two sisters - marmaids, beautiful women with fish tails, living in the depths of the seas. One of them liked the rocks in the Danish straits and so far we can see her sitting on a rock at the entrance to the harbor in Copenhagen.The second sailed up the great seaside port of Gdańsk, Vistula and then sailed up its course. According to legend, at the foot of today's Old Town, around the spot where he is now her memorial, she left the water on the sandy shore to rest, and that the place she loved, decided to stay. Soon the fishermen noticed that when they catch someone churning the waves of the Vistula River, tangling the nets and releasing the fish. But the mermaid enchanted them with her beautiful singing, and nothing happend to her.One day a wealthy merchant saw the mermaid and her beautiful singing. Quickly calculated how much money he could earn if he captured the mermaid and her show at fairs. He tricked the marmaid and imprisoned her in a wooden shed with no access to water. Complaints young farmhand heard the mermaid, the son of a fisherman and with the help of friends at night, freed her. Siren of gratitude for the fact that people stood in her defense promised them that if necessary they can also count on her help. This is why the Warsaw Mermaid is armed - has a sword to defend the city.