Why does Dante describe Hell as a city and give it clearly defined geographic features

I need short answers for these questions: Dante Alighieri, from The Divine Comedy, “Inferno,” Cantos I-V.
1-2 Why does Dante describe Hell as a city and give it clearly defined geographic features?
Dante, “Inferno, “Cantos XVII-XIX, Canto XXVI, and Dante, “Inferno,” Cantos XXXI-XXXIV;
2-1 How does Canto XIX address 14th-century political concerns over state vs. church government in Florence ?

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