The History of Wall Fountains
The History of Wall Fountains The translation of hundreds of ancient Greek texts into Latin was commissioned by the learned Pope Nicholas V who led the Church in Rome from 1397 until 1455. Embellishing Rome and making it the worthy capital of the Christian world was at the heart of his objectives. Restoration of the Acqua Vergine, a ruined Roman aqueduct which had carried fresh drinking water into the city from eight miles away, began in 1453 at the bidding of the Pope. A mostra, a monumental commemorative fountain built by ancient Romans to mark the point of entry of an aqueduct, was a practice which was restored by Nicholas V. The present-day site of the Trevi Fountain was once occupied by a wall fountain commissioned by the Pope and constructed by the architect Leon Battista Alberti.
The One Cleaning Solution to NEVER Use On Your Outdoor Wall Fountains

Experts recommend that the typical garden fountain undergoes a thorough scouring every three-four months. First you must remove the water. When you have done this, scrub inside the water reservoir with a gentle detergent. A useful tip is to use a toothbrush if there are small hard-to-reach spots. Do not leave any soap deposits inside or on the fountain.
Make sure you get rid of any calcium or plankton by taking the pump apart and washing the inside carefully. Soaking it in vinegar for a while will make it easier to wash. Mineral or rain water, versus tap water, is ideal in order to eliminate any build-up of chemicals inside the pump.
And finally, make sure the water level is consistently full in order to keep your fountain operating optimally. Low water levels can damage the pump - and you do not want that!