How to get the count of belonging of belonging relationship in Laravel?

I have a model Gallery it has many Painters and the painters have many Artworks how to get the count of all Artworks in a Gallery?

This is the relationships for the gallery models:

class Gallery extends Model
{
    public function painters()
    {
        return $this->hasMany('App\Painter');
    }
}

The painters model:

class Painter extends Model
{
  public function gallery()
  {
      return $this->belongsTo('App\Gallery');
  }

  public function artworks()
  {
      return $this->hasMany('App\Artwork');
  }

}

The artwork model:

class Artwork extends Model
{

  public function painter()
  {
      return $this->belongsTo('App\Painter');
  }
}

via Chebli Mohamed