Visitors who break the rules face fines of up to €240
Officials in Rome have placed a number of restrictions on dozens of the city's historic fountains.
Anyone caught entering or bathing in the monuments can now face fines of between €40 and €240.
The new rules also forbid eating or drinking around the fountains.
Visitors will, however, still be able to indulge in the tradition of throwing coins into the water.
Announcing the measures, the mayor's office said the restrictions will be in place until 31st October.
The restrictions are aimed at protecting sites of "particular historical, artistic and archaeological heritage".
The new rules apply to many of the historic fountains in the city, most notably the Trevi Fountain.
The fountain - which was completed in the 18th century - features prominently in the classic Italian film La Dolce Vita.
An iconic scene in the 1960 film sees actress Anita Ekberg frolic in the water.
Roman authorities have already placed restrictions on many of the city's other tourist spots.
The Local reported last year that seven tourists were hit with fines after being caught drinking on the newly refurbished Spanish Steps.