Question: The Tragedy of Lucretia is a tempera and oil painting on a wood "cassone" or "spalliera" panel by whch Italian Renaissance master, it is housed in the Isabella Stewart Gardner Museum of Boston, Massachusetts, having been owned by Isabella Stewart Gardner in her lifetime?
Context: Portrait of Tommaso Inghirami is an oil painting by Italian artist Raphael.  Painted ca. 1509, it exists in two copies, one of which is in display in the Palatina Gallery of Palazzo Pitti in Florence and the other in the Isabella Stewart Gardner Museum in Boston.  Known for its realism and attention to detail, the image is reminiscent of works by Hans Holbein the Elder, by whom Raphael may have been influenced in its execution.  Stylistically, it relates to Raphael's "Portrait of Agnolo Doni", ca.1506, in what Claudio Strinati described in 1998 as its "merciless clarity." A Lady and Gentleman in Black is a painting by the Dutch artist Rembrandt, painted in 1633.  The oil-on-canvas painting measures 131.6 x .  The painting hung in the Isabella Stewart Gardner Museum of Boston, Massachusetts, prior to being stolen in 1990. John "Jack" Lowell Gardner II (November 26, 1837 – December 10, 1898) was an American businessman, art collector, and philanthropist.  He and his wife, Isabella Stewart Gardner, were patrons of the arts whose collection is now housed in the Isabella Stewart Gardner Museum, in Boston. Isabella Stewart Gardner (April 14, 1840 – July 17, 1924) was a leading American art collector, philanthropist, and patron of the arts.  She founded the Isabella Stewart Gardner Museum in Boston. Chez Tortoni is a painting by the French artist Édouard Manet, painted ca. 1878–1880.  The oil-on-canvas painting measures 26 x .  The painting hung in the Isabella Stewart Gardner Museum of Boston, Massachusetts, United States, prior to being stolen in 1990. Virgin and Child with an Angel also known as Our Lady of the Eucharist (Italian: "Madonna dell'Eucarestia") is a tempera on wood panel painting by Sandro Botticelli made c.1470.  It is now held by the Isabella Stewart Gardner Museum in Boston, Massachusetts, acquired from Prince Chigi in 1899.  The painting measures 85.2 xx and one of a series of Madonna paintings by Botticelli from 1465 and 1470.  It shows influences from Filippo Lippi's "Virgin and Child and Angels" of c.1465 held by the Uffizi. The Rape of Europa is a painting by the Italian artist Titian, painted ca. 1560-62.  It hangs in the Isabella Stewart Gardner Museum of Boston, Massachusetts.  The oil-on-canvas painting measures 178 x . Landscape with Obelisk is painting by Dutch artist Govert Flinck, painted in 1638.  The oil-on-wood painting measures 54.5 x .  It was formerly attributed to Rembrandt.  The painting hung in the Isabella Stewart Gardner Museum of Boston, Massachusetts, United States, prior to being stolen in 1990. The Tragedy of Lucretia is a tempera and oil painting on a wood "cassone" or "spalliera" panel by the Italian Renaissance master Sandro Botticelli, painted between 1496 and 1504.  Known less formally as the Botticelli Lucretia, it is housed in the Isabella Stewart Gardner Museum of Boston, Massachusetts, having been owned by Isabella Stewart Gardner in her lifetime. The Isabella Stewart Gardner Museum (called Fenway Court during Isabella Stewart Gardner's lifetime) is a museum in the Fenway-Kenmore neighborhood of Boston, Massachusetts, located within walking distance of the Museum of Fine Arts (although the Museum of Fine Arts's Huntington Avenue location was constructed after Fenway Court) and near the Back Bay Fens.  The museum houses an art collection of world importance, including significant examples of European, Asian, and American art, from paintings and sculpture to tapestries and decorative arts.
Answer: Sandro Botticelli