The top picture is of the King Cyrus, a Persian king. King Cyrus, also known as Cyrus the Great, is one of the most famous Persian kings, in that he founded the Achaemenid Period and inscribed the first declaration of human rights.
The bottom picture is an Arabic phrase from the Quran. It says “Bismillah al Rahman al Rahim” which translates to “In the name of God, the most gracious and most merciful”.
The acoustics in the 400 year old mosque are amazing & notes hang in the air with crystal clarity. The singer is a student from northern Iran visiting Isfahan & had always wanted to sing in the mosque because of its unique acoustic resonance qualities. You have to stand on the tiled square for perfect effect.
Ancient Persian engineers made their
own freezers that kept ice cold - even
during desert summers. By 400 BCE,
they’d perfected the ‘yakhchal,’ which
which are made of thick, heat-resistant
materials with vents that funnel breezes
to an underground storage area and
push warm air out through the top. Ice
brought in during winter was used to
make chilled treats in the summer. Source