> ## Documentation Index
> Fetch the complete documentation index at: https://docs.therootnetwork.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Historical

## Storage

### historicalSessions

Mapping from historical session indices to session-data root hash and validator count.

**Namespace**

```
api.query.historical.historicalSessions
```

**Type**

```
function historicalSessions(
  u32
): Option<(H256,u32)>
```

### storedRange

The range of historical sessions we store. \[first, last)

**Namespace**

```
api.query.historical.storedRange
```

**Type**

```
function storedRange(

): Option<(u32,u32)>
```