The celebration of the festival has its origin in the combination of two different medieval events. Commercial secular fairs were held at the beginning of the summer. As cattle merchants came into town with their animals, eventually bullfighting came to be organized as a part of the tradition. Specifically, they were first documented in the 14th century. On the other hand, religious ceremonies honoring the saint were held on October 10. However, in 1591 they were transferred to July 7 to take place at the same time as the fair, when Pamplona's weather is better. This is considered to be the beginning of the Sanfermines. During medieval times acts included an opening speech, musicians, tournaments, theatre, bullfights, dances or even fireworks. Bullrunning appears in 17th and 18th century chronicles together with the presence of foreigners and the first concerns about the excessive drinking and dissolute behavior during the event. Finally, the Parade of Giants[c] was created in the mid-19th century. The first official bullring was constructed in 1844.