Best of
Alternate-History
1941
Lest Darkness Fall
L. Sprague de Camp - 1941
He knew where he was--Rome. He was there to study archaeology, and even though the lightning had left him dazed, he could see the familiar Roman buildings. But the buildings looked newer and the crowds in the street were wearing tunics, not suits! And a rich barnyard smell had replaced the gasoline-and-garlic aroma of modern Rome. So, when was he? And he was suddenly cold with fear of the answer...