St. Agnes was built in response to the growing religious demands of Chinese Christian immigrants flooding into the Markham area from places like Hong Kong and Mainland China.

The mission celebrated their first Mass on December 6, 1992, at Christ the King Catholic Elementary School.

Ruggiero filed another application to the Archdiocese of Toronto, this time for a site to build a new church.

Ruggiero immediately started the fund raising campaign and appointed architect Mr. David Sin to design the new church in August 1997.

The actual construction contract consisted of two phases since funds for the whole project could not be raised in time when tenders were called.

The second phase, which included the office, internal fixtures and decors, began in December 2001 and ended in April 2002.

As more of the windows are revealed, one begins to see “The Angelic Ladder”, which is symbolic of the spiritual journey to a new land (heaven).