Pittsburgh Art Places


Mellon Park, intersection of Fifth and Penn Avenues

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City of Pittsburgh, Mellon Park, steel

Artwork Type


Five Factors


Peter Calaboyias


Owner City of Pittsburgh
ADA Services The sculpture is located off the paved path that circles Mellon Park.

Five Factors was originally installed outside of the Carnegie Library in Squirrel Hill in 1973. The work was commissioned through the City of Pittsburgh's percent for art program that stipulated that 1% of any public building project be designated for art.

Five Factors was taken out of storage and restored in 2011. It now resides in Mellon Park.

Calaboyias described the sculpture as such: ""The period of post war abstract expressionism (1945-1979) produced works in sculpture that moved away from figurative subjects to the pursuit of forms and shapes on a large scale.  The materials of choice were steel, stainless steel, plastics and works in as-quarried stones.  This work is from that movement that gave rise to the placement of large works in public places, corporate spaces and sculptural gardens."

Peter Calaboyias (b. 1940) is a sculptor who hails from Johnstown, Pennsylvania, by way of Greece. He currently resides in Pittsburgh and still operates a foundry in his home to cast bronze. His has worked in a variety of materials including bronze, wood, and aluminum. Calaboyias’ sculpture can be found all over the world and was even commissioned for the Olympic Games in 1996.