Short answers, pulled from the story.
Trajan's Market was probably built between 100 and 110 AD by Apollodorus of Damascus, an architect who followed Emperor Trajan on his military campaigns and was entrusted with planning Trajan's Forum. The complex was inaugurated in 113 AD.
Trajan's Market is located on the Via dei Fori Imperiali in Rome, at the opposite end of the street from the Colosseum. The modern entrances are at Via Quattro Novembre 94 and Piazza Madonna di Loreto.
Trajan's Market is often described as the world's oldest shopping mall, but many scholars now believe its arcaded spaces were administrative offices for Emperor Trajan rather than commercial retail spaces in the modern sense. The complex did include shop units called tabernae and a street, the Via Biberatica, lined with taverns and grocers.
The Via Biberatica is a road that cuts through Trajan's Market, named from the Latin bibo and bibere meaning "to drink." The street earned its name because it was the location for several Roman taverns and grocers' shops in the area.
The Torre delle Milizie, or "militia tower," is a defensive structure added to the Trajan's Market complex during the Middle Ages. It was built in 1300 and is still visible today as part of the multi-layered history of the site.
The Museum of the Imperial Fora (Museo dei Fori Imperiali) opened in 2007 within Trajan's Market. It houses artifacts from all of ancient Rome's forums and is accessible through the market's main entrances.