Shaded by a sweet orange tree, visitors milled about the dirt-floor courtyard of a historic house that is now the Presidio San Agustín del Tucson Museum, on a breezy Tuesday afternoon.
About 250 years ago, in that same courtyard, children played ball, while mothers prepared food, tended gardens, and soldiers practiced their drills.
Back then, it wasn’t a house or a museum — it was a fortress and the founding building of a fledgling community that would grow to be Arizona’s second largest city…