Horvitz was born and lives in Philadelphia, PA, and works in a studio in the pinelands of NJ. She was Executive Director from 1976 to 1997 and Founder of NEXUS/Foundation For Today’s Art. Horvitz was awarded her doctorate in College Teaching of Fine Arts from Columbia University, NYC.

Dr Horvitz collaborates with her partner Robert Roesch on large-scale public art projects. She has received several fellowships from PA’ Council on the Arts, Mid Atlantic Arts Foundation, grants from National Endowment for the Arts, Fulbright Foundation and a Masterworks Fellowship from The Center For Creative Glass.

She has had one person exhibitions and is in the permanent collection of the Gulbenkian Museum, Portugal, Fyns Kunstmuseum, Denmark, Utah Museum, Museum of Greater Victoria, and Musée D’Art Contemporain in France. Her work has also been exhibited in and is in the permanent collection of many international museums including, Musée d’Art Moderne, Paris, Corning Museum, Museum of American Glass, and Glasmuseum, Denmark. Horvitz has had exhibitions of her artwork in South America, the Far East and the Middle East, Horvitz has curated over 30 artist book exhibitions internationally. She was the curator of the American Pavilion of the 2004 Biannual of Artists Books and the co- curator of the 2007 Biannual - at Bibliotheca Alexandrina, Alexandria Egypt.

Her artist books are in many international collections including: Kyoto Institute of Technology Museum, Japan, Bibliotheca Alexandrina Museum, Alexandria, Egypt, Szent Istvan Kiraly Muzeum (Hungary), Paper Museum, Tokyo, François Côté, libraire à Bibliopolis,. Montréal, Canada. National Museum of Women in the Arts, Washington, DC, Yale University, New Haven, CT, Awagami Museum, Tokushima, Japan, The Smithsonian American Art Museum/ Library, Washington, DC, Ruth and Marvin Sackner, FL, Joseph Curtis Sloane Art Library, University of NC.