How do we know the imam Mahdi peace be upon him if he appeared?

Our Joseph imam AL-Mahdi

Demolition of Al-Baqi graves

L’incident des partis (la bataille de la tranchée)

The supplication of Imam al-Sadiq, peace be upon him, for the visitors of al-Hussein, peace be upon him
La súplica del Imam al-Sadiq, la paz sea con él, para los visitantes de al-Hussein, la paz sea con él
AL-Mahdi tv

Ashura day

Cartoon for children, Imam Ali, episode 1

Of the etiquette with Imam Mahdi
Standing in honor of mentioning His Blessed Name AL-Qaim

Of the etiquette with Imam Mahdi
Believing with him may God Almighty hasten his relief

Mahdist hymns
The cruelty of the heart