The Holy Refuge, also called the Warren, is a temple in Braavos. It is a large brick structure covered with lichen. Within it the forgotten gods are honored.
A Feast for Crows
Yorko Terys shows the Holy Refuge to Arya Stark while taking her to the House of Black and White. Arya thinks the Holy Refuge looks like a storehouse.
A Dance with Dragons
Talea sometimes sells shellfish outside the Warren.