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| Giovanni Guerra Beheading of Pope Sixtus II before 1618 drawing Museo del Prado, Madrid |
"Born in Modena, Giovanni Guerra arrived in Rome in 1562, where he became a member of the Accademia di S. Luca. He established a workshop with Cesare Nebbia (ca. 1536-1614) and together they secured numerous papal commissions. These included the decoration of the Salone Sisto in the Vatican Library (1585-1589) and that of the Scala Santa at Porta S. Giovanni. Guerra and Nebbia collaborated in preparing the designs for these decorative schemes, before a large team of assistants executed them. This workshop procedure was such that only one of Guerra's sequences of paintings is known to be autograph, the frescoes at the Palazzo Cenci, Rome (1590). His surviving drawings are numerous and are now widely dispersed."
– Nicholas Turner, From Michelangelo to Annibale Carracci: A Century of Italian Drawing from the Prado (2008)
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| Giovanni Guerra Ceiling Design with Instruments of the Passion ca. 1580-1600 drawing Victoria & Albert Museum |
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| Giovanni Guerra Design for a Decorative Frame before 1618 etching Rijksmuseum, Amsterdam |
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| Giovanni Guerra Design for a Decorative Frame before 1618 etching Rijksmuseum, Amsterdam |
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| Giovanni Guerra Design after a Fountain in the Villa Aldobrandini at Frascati ca. 1590-1600 drawing Metropolitan Museum of Art, New York |
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| Giovanni Guerra Design for a Fountain in a Grotto, with a River God ca. 1598 drawing Metropolitan Museum of Art, New York |
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| Giovanni Guerra Shadrach, Meshach and Abednego saved from the Fiery Furnace before 1618 drawing Morgan Library, New York |
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| Giovanni Guerra The Dream of Mordecai before 1618 drawing National Gallery of Art, Washington DC |
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| Giovanni Guerra Ceiling Design with Allegorical Figures and the Arms of Pope Sixtus V ca. 1587 with central insert by Domenico Maria Viani added after 1690 St Joseph and the Christ Child drawing National Gallery of Art, Washington DC |
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| Giovanni Guerra St Paul surrounded by Disciples after his Lapidation at Lystra before 1618 drawing Metropolitan Museum of Art, New York |
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| Giovanni Guerra Study for the Story of Esther before 1618 drawing Groeningemuseum, Bruges |
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| Giovanni Guerra Study for the Story of Esther before 1618 drawing Groeningemuseum, Bruges |
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| Giovanni Guerra Study for the Story of Esther before 1618 drawing British Museum |
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| Giovanni Guerra Study for the Story of Esther before 1618 drawing British Museum |