<prompt> Translate the following text to EnglishJumba hilo lina nguzo ya kati yenye ukutani wenye picha za Agano la Kale zilizochongwa kwa heshima na kwa nguvu na Jacopo della Querccia, msanii wa Siena.  <response>: It has a fine central portal with reliefs of Old Testament scenes on its pilasters sculpted with great dignity and power by Siena-born master Jacopo della Quercia. 