Johannes Vermeer's "Lady Writing a Letter with her Maid"

Nationality: Dutch
Born-Died: 1632-1675
Creation Date: c. 1670-71
Size: 28.4 × 23.4 inch (72.2× 59.5 cm)
Media: Oil on canvas
Location: The National Gallery of Ireland, Dublin, Ireland
I confess that I have never seen this painting before.