<prompt> Translate the following text to SwahiliThe importance of Sienas 13th- and 14th-century school of art is best illustrated in the imposing Palazzo Buonsignoris National Art Gallery Pinacoteca Nazionale.  <response>: Kwa mfano, katika karne ya 13 na 14, jiji la Siena lilikuwa na nyumba kubwa ya sanaa inayoitwa Palazzo Buonsignori, ambayo pia ina Jumba la Sanaa la Taifa. 