Complex sentence: The site was formerly known as the Forbury, and one of the roads flanking the current gardens is still known as The Forbury, and fairs were held on the site three times a year until the early 19th century.
Split into simpler sentences: The site was formerly known as the Forbury, and one of the roads flanking the current gardens is still known as The Forbury. Fairs were held on the site three times a year until the early 19th century.