What is the name of artistic retreat in Europe possibly Spain frequented during late nineteenth and early twentieth century by American writers day?

You're likely thinking of "The White Way of Delight", a term used to describe the Spanish town of Granada and its surrounding area. It was a popular destination for American writers, artists, and intellectuals in the late 19th and early 20th centuries, particularly during the "Golden Age of American Expatriation."

Here's why Granada became so popular:

* The Alhambra: This magnificent palace complex, with its Moorish architecture and stunning views, was a major source of inspiration.

* The Sierra Nevada Mountains: The nearby mountains offered breathtaking landscapes and a sense of tranquility.

* The Artistic and Cultural Scene: Granada had a vibrant artistic scene, with a flourishing arts community and frequent cultural events.

Some notable American writers who visited and were inspired by Granada include:

* Washington Irving

* Ernest Hemingway

* Gertrude Stein

* F. Scott Fitzgerald

* Langston Hughes

It's important to note that "The White Way of Delight" was not an official name for a specific retreat, but a term used by the writers and artists themselves to capture the beauty and allure of the region.