This page has a description of this location. The only way to access Hall Of Heroes is to collect a full chalice in a level (you can fill it by killing enemies). After completing a level and getting a chalice, the game will automatically move you to the Hall Of Heroes. Here, you can exchange chalices for weapons and other boosters - approach the illuminated statue and interact with it.
Things to find
- 2 books
The first book is right in front of the Hall Of Heroes, the second one is further on, in front of the stairs.