The best answer to that question would be "Jesus".
If you're keen to know the current earthly leader, Christianity is a very divers faith so there is no one single universally recognised "religious leader".
Catholics recognise the pope (currently Pope Francis) as their earthly leader. Other churches recognise other leaders and adopt different models of church leadership.
there is nudity in christian religious art
islam, chistianity, judaism
zoroaster was a persian religious leader
God.
Chistianity
Judaism has not had one central religious leader in almost 2,000 years.
Peter Spencer - religious leader - died in 1843.
Peter Spencer - religious leader - was born in 1782.
zoroaster was a persian religious leader
yes
29 AD
Buddhism has many sects and schools and so there is no single religious leader. Much as the pope may be regarded as a Christian leader, he is not the leader of all Christians.