Bank of Montreal will build a high-tech workplace for employees over parts of the CF Eaton Centre on the southwest corner Yonge and Dundas Sts., the company says. As is fashionable, the large space will be known as a campus. A news conference with the mayor and company executives present was set for Thursday morning. The new facility will add four storeys to the present structure and house as many as 3,500 employees. It will feature “advanced digital technology, natural light through a four-storey atrium and collaborative workspaces,” the bank says. It is expected to be finished in 2021.