The Roman Inquisition, however, declared that his views on physics and cosmology were theological and demanded that he retract. Bruno answered quite honestly that he did not know what he was being asked to retract, trying to convince the Inquisition that his views were in accord with Christianity. Pope Clement VIII demanded that Bruno be sentenced as a heretic and the Inquisition passed the death sentence on him.
Ang Roman-uusisa, gayunpaman, na ipinahayag ng kanyang views sa pisika at kosmolohiya ay teolohiko at hinihingi na niya bawiin. Bruno mitubag lubos na matapat na siya ay hindi alam kung ano siya ay nagtanong sa bawiin, sinusubukang kumbinsihin ang mga pagtatanong na ang kanyang mga views ay ayon sa Kristiyanismo. Pope Clement VIII hinihingi na Bruno ay sentenced bilang isang erehe at ang pagsisiyasat sa lumipas ang kamatayan parusa sa kanya.