<prompt> Translate the following text to EnglishKwa 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.  <response>: The importance of Sienas 13th- and 14th-century school of art is best illustrated in the imposing Palazzo Buonsignoris National Art Gallery Pinacoteca Nazionale. 