1. Via San Gregorio Armeno, also known as Christmas Alley, is a famous street in Naples that is dedicated to the art of nativity scenes. The street is lined with shops and workshops that specialize in creating and selling intricately detailed nativity scenes, known as presepi in Italian.

The tradition of creating nativity scenes in Naples dates back to the 18th century, and Via San Gregorio Armeno has become the epicenter of this tradition. Visitors can admire a wide range of nativity scene figures, from traditional Biblical characters to modern pop culture figures.

2. The shops along Via San Gregorio Armeno are usually open throughout the year, but they are most popular during the Christmas season. It is recommended to visit in the morning or early afternoon to avoid the crowds. Unfortunately, there is no central phone number for the street, as each shop operates independently.

3. There is no entrance fee to visit Via San Gregorio Armeno, as it is a public street. The street is located in the historic center of Naples and can be easily reached on foot from the main train station or by public transportation. It is recommended to take a taxi or public bus to reach the street, as parking in the area can be difficult.