The mosaic represents in the foreground a dove, a symbol of peace, above an anchor and a background dotted with flowers fl.
The dove is salient with respect to the background of the mosaic.
This technique was very popular in Venice between the end of the 19th century and the 1930s.
Some traces of dirt, but in very good condition.
For more detailed pictures: https://www.dropbox.com/sh/sh6i965sqslk2tc/AAAxXx1MqbYoWxuWDXEROYSfa?dl=0