Sure, nothing directly points to Sirius which would be visible to the normal visitor.

Imagine the emperor of the largest country on Earth, just coming back from an Egypt trip having met the queen of the country with the largest buildings on Earth and then discovering that his buildings while not insignificant are not nothing against the pyramids. Combined what he learned at Dendera, why not renaming the Roman calendar to his name and letting it start at the same absolutely constant marker in the sky he has just learned about?