In his lecture, he explained how Twelverism shaped political institutions in Iran by emphasizing the authority of the Twelve Imams and the belief that the Mahdi is the hidden Twelfth Imam who will return.

The antique shop displayed several twelvemos, their worn covers hinting at a history of frequent readings.

She treasured the twelvemo for its compact size, a duodecimo volume produced by cutting twelve leaves from a single large sheet.