O'Shea and Whelan was an Irish family practice of stonemasons and sculptors from Ballyhooly in County Cork. They were notable for their involvement in Ruskinian gothic architecture in the mid-19th century.
The practice comprised the brothers James and John O'Shea, along with their nephew Edward Whelan. James and John were the sons a craftsman who came to Cork to work on the construction of Convamore House, and who remained and set up a workshop in nearby Ballyhooly village. After his death the workshop was inherited by James and John, and is often referred to as "The O'Shea Brothers". However Whelan's role in the firm was equally significant. Nevertheless, James O'Shea was the most notable of the family. In addition to his work as an architectural mason he exhibited fine art sculptures in the classical style.
The O'Sheas initially achieved notability for their floral carvings and grotesqueries on buildings in Dublin, in particular at Trinity College and at the Kildare Street Club, including the famous window piece showing the club members as monkeys playing billiards.
At the time John Ruskin was seeking to revive lively freehand stone carving of the kind typical of medieval Gothic architecture. The architects Thomas Newenham Deane and Benjamin Woodward were proposing to work with Ruskin on the design of the new Oxford University Museum of Natural History. Woodward, who had worked with them in Dublin, brought in the O'Sheas as the best qualified carvers for the job. The O'Sheas worked in tandem with Ruskin and the architects to produce a series of elaborate carvings of plant and animal forms. Each was a unique and individual design.
James O'Shea also attempted to establish himself as a fine artist with Ruskin's help, though Ruskin eventually declared himself "disappointed" with the carver's work. Ruskin later claimed that "the delight in the freedom and power which would have been the elements of all health to a trained workman were destruction to him...I hoped he would find his way in time, but hoped, as so often, in vain."
Further problems arose when the Convocation of the university refused to pay for more carvings, which had largely been funded by public subscriptions. When the O'Sheas offered to work without pay, some members of Convocation accused them of "defacing" the building with unauthorised work. According to Henry Acland, the professor who liaised with Ruskin, James O'Shea proceeded to carve caricatures of members of Convocation on the entrance of the building in the form of parrots and owls. Acland forced him to remove the heads, which remain defaced to this day.