An Empty Throne

A traveler once went off the road searching for shelter at an off-road cost, and there he discovered a seat that could only be called a throne for the size of it and the luxuriousness.
After looking around in every direction to reassure himself there was no enforcer of etiquette, he sat in it. Immediately a castle appeared around him, and servants, and guards who, far from removing him from the seat, asked what duchy he wanted punished. Expert musicians, and as for the food, that had no less skill put into it. Satiated, he stood up to take care of a sudden need.
His castle vanished. He looked around again, wondering where went his kingdom. Finding no sign of it, he stared at the throne and wondered at its power. That done, he went on his way, "For I am a traveler," as he said to himself.
Finis