During the early 2nd century, Londinium was at its height, having recovered from the fire and again had between 45,000 and 60,000 inhabitants around the year 140, with many more stone houses and public buildings erected. Some areas were tightly packed with townhouses (). The town had piped water and a "fairly-sophisticated" drainage system. The governor's palace was rebuilt and an expanded forum was built around the earlier one over a period of 30 years from around 90 to 120 into an almost perfect square measuring . Its three-storey basilica was probably visible across the city and was the largest in the empire north of the Alps; the marketplace itself rivaled those in Rome and was the largest in the north before Augusta Treverorum (Trier, Germany) became an imperial capital. The city's temple of Jupiter was renovated, public and private bathhouses were erected, and a fort () was erected around the year 120 that maintained the city garrison northwest of town. The fort was square (with rounded corners) measuring more than and covering more than . Each side had a central gatehouse and stone towers were erected at the corners and at points along each wall. Londinium's amphitheatre, constructed in AD 70, is situated at Guildhall.