Sites of Grace on the recommended route:

Main Academy Gate

Church of the Cuckoo

Schoolhouse Classroom

Debate Parlor

Arrival at the Sites of Grace South Raya Lucaria Gate.  Enter Academy of Raya Lucaria.

Depart from the Sites of Grace - Church of the Cuckoo, take the waterwheel to the top, find and activate the Sites of Grace - Schoolhouse Classroom

Go out from the Sites of Grace - Schoolhouse Classroom, find and defeat the boss - Red Wolf of Radagon. Get the Memory Stone after defeating enemies.

Red Wolf of Radagon - Elden Ring Raiders