David Cortez Medalla (23 March 1942, Manila, Philippines – 28 December 2020, Manila, Philippines) was a Filipino international artist and political activist. His work ranged from sculpture and kinetic art to painting, installation, and performance art.
He co-founded Signals London in 1964 and edited the Signals Newsbulletin until 1966. Medalla founded the Exploding Galaxy, an artists collective, in 1967 and from 1974-77 was chairman of Artists for Democracy, dedicated to supporting liberation movements worldwide. He lived and worked between London, New York and Paris.
- editor, Signals: Newsbulletin of the Centre for Advanced Creative Study, 10 issues, London: Signals Gallery, Aug 1964-Mar 1966; facsimile repr., index by Julian Zinovieff, London: Institute of International Visual Arts, 1995.     Review: Overy (1997).
- Adam Nankervis, "A Stitch in Time: David Medalla", Mousse 29, Milan, 2011. (English)/(Italian)
- N P James, David Medalla: Works in the World - Exploding Galaxy, The Bubble Machine, Cv Publications, 2012, 64 pp. Excerpt. Interview with Medalla explores his art, performance and poetry from 1960 in London and Paris to the present day. 
- Guy Brett, "David Medalla: From Biokineticism to Synoptic Realism", Third Text 3:8-9 (1989), pp 79-106. 
- Guy Brett, Exploding Galaxies: The Art of David Medalla, foreword Dore Ashton, London: Kala Press, 1995, 216 pp, IA. . Review: Overy (1997).
- John Albert Walker, Left Shift: Radical Art in 1970s Britain, I.B.Tauris, 2001.