 Beginning 
          in 1490 Durer travelled widely for study, including trips to Italy in 
          1494 and 1505-7 and to Antwerp and the Low Countries in 1520-1. During 
          his visit to Venice on his second Italian trip Durer was especially 
          influenced by Giovanni Bellini and Bellini's 
          brother-in-law Andrea Mantegna, each then 
          near the end of his career. In The Uffizi: A Guide to the Gallery 
          (Venice: Edizione Storti, 1980, p. 57) Umberto Fortis comments that 
          Durer's journeys enabled him "to fuse the Gothic traditions of the North 
          with the achievements in perspective, volumetric and plastic handling 
          of forms, and color of the Italians in an original synthesis which was 
          to have great influence with the Italian Mannerists."
Beginning 
          in 1490 Durer travelled widely for study, including trips to Italy in 
          1494 and 1505-7 and to Antwerp and the Low Countries in 1520-1. During 
          his visit to Venice on his second Italian trip Durer was especially 
          influenced by Giovanni Bellini and Bellini's 
          brother-in-law Andrea Mantegna, each then 
          near the end of his career. In The Uffizi: A Guide to the Gallery 
          (Venice: Edizione Storti, 1980, p. 57) Umberto Fortis comments that 
          Durer's journeys enabled him "to fuse the Gothic traditions of the North 
          with the achievements in perspective, volumetric and plastic handling 
          of forms, and color of the Italians in an original synthesis which was 
          to have great influence with the Italian Mannerists."  
        
 
          The period between his Italian trips was one of great productivity and 
          artistic growth, characterized by his publication, 1496-8, of a portfolio 
          of woodcuts, The Apocalypse of St. John. Scholars have suggested 
          that the portfolio may have been intended as a veiled expression of 
          support for the Reformation, with Babylon used as a surrogate for Rome. 
           
        
 Beginning 
          at least as early as 1512, Durer became portraitist to the rich and 
          famous of his time, including Emperor Maximilian I, c. 1518, and Christian 
          II of Denmark, 1521. Other sitters included Jacob Fugger and other prominent 
          merchants, clergy and government officials. An early chalk and watercolor 
          portrait by Durer, 1494-5, appears 
          to copy Gentile Bellini's profile 
          painting, now lost, of Queen Caterina Cornaro 
          (B-31) following her surrender of her throne in Cyprus and retirement 
          to her native Venice. Shown here are Durer's own self-portraits at ages 
          22, 26 and 28 (now in the collections of the Louvre, Prado and Alte 
          Pinakothek of Munich).
Beginning 
          at least as early as 1512, Durer became portraitist to the rich and 
          famous of his time, including Emperor Maximilian I, c. 1518, and Christian 
          II of Denmark, 1521. Other sitters included Jacob Fugger and other prominent 
          merchants, clergy and government officials. An early chalk and watercolor 
          portrait by Durer, 1494-5, appears 
          to copy Gentile Bellini's profile 
          painting, now lost, of Queen Caterina Cornaro 
          (B-31) following her surrender of her throne in Cyprus and retirement 
          to her native Venice. Shown here are Durer's own self-portraits at ages 
          22, 26 and 28 (now in the collections of the Louvre, Prado and Alte 
          Pinakothek of Munich).  
        
  
          Durer expressed his theories on proportion in The Four Books on Human 
          Proportions, published posthumously in 1528.