The Calling of Isaiah is a fresco painting by Giovanni Battista Tiepolo (1696–1770), created in 1726. Measuring 250 × 200 cm, it depicts the biblical scene from Isaiah 6. This painting is housed at Palazzo Patriarcale, Piazza del Patriarcato, Udine.
The painting depicts the Prophet Isaiah at the moment where he is called to prophecy. The approaching angel holds a piece of burning coal to his lips with tongs and so brings about the forgiveness of his sins. Isaiah hears the voice of the Lord and agrees to his mission.