Water and marble and that silentness
Which is not broken by a wheel or hoof;
A city like a water-lily, less
Seen than reflected, palace wall and roof,
In the unfruitful waters motionless,
Without one living grass's green reproof;
A city without joy or weariness,
Itself beholding, from itself aloof.
Poetry Atlas has many other poems about Venice.
And many, many poems about Italy.