August Florian Jaccaci was born in Fontainebleau, France in 1856. After traveling extensively in various countries including Mexico and Cuba, he settled in the United States in the early 1880s. He worked briefly as an artist in the Midwest, creating murals on commission, including a mural in the Capitol building in St. Paul, Minnesota. Jaccaci then moved to New York City and worked as art editor for Century magazine. Besides serving as art editor, he also wrote several articles and executed illustrations for the magazine. On the recommendation of artist Will H. Low he became art editor of McClure's magazine at its founding in 1896. A year later he wrote the book on his travels entitled, On the trail of Don Quixote: being a record of rambles in the ancient province of La Mancha [sic]. He left McClure's in 1902 and in 1903 began working on a major multi-volume book entitled Noteworthy Paintings in Private American Collections. Jaccaci envisioned a 15 volume set with essays about American art collections written by distinguished art historians. Though Jaccaci knew many writers, art critics, and artists through his magazine work, he was not a well-known art historian and asked artist John La Farge to be the co-editor of the book. La Farge's reputation provided access to major American collections of artwork. The publishing company Merrill and Baker was to publish the work, but it went bankrupt in 1904. Jaccaci then bought their property for his project and called it the August F. Jaccaci Co. The first volume was published in 1909, and John La Farge died in 1910. Though Jaccaci continued working on the next volume, the project failed in 1912. Besides working on this project, Jaccaci also served as editor of the "Art in America" section of Burlington Magazine from 1907 to 1910.
In 1914 August Jaccaci went to Europe on art related business. With the start of World War I, he decided to stay in France and pursue philanthropic work. He founded the Society for Protection of Children of the Frontier, and established a children's hospital, receiving many honors for his service. He died in Neuf-De-Grasse, France in 1930.