What is the fine-grained topic of the following text: In 1872 he was appointed professor at the Academy of Mechelen and obtained important orders for the cities of Antwerp, Mechelen and Tournai (ea., Tympanum of the Antwerp Flemish theatre, statues for the Tournai and Mechelen courthouses). Only return the topic.
The professor's architectural and artistic contributions in Antwerp, Mechelen and Tournai.