<prompt> Translate the following text to EnglishSehemu ya ndani ya hekalu hilo ina michoro ya mtindo wa Byzantium, madhabahu ya karne ya 11, na kaburi lililojengwa juu ya nguzo za kale za Waroma na Waetruria.  <response>: The sober interior has Byzantine-style frescoes, an 11th-century altar canopy, and a crypt built on Etruscan and ancient Roman pillars. 