If you are traveling to Czech Republic with Canadian passport in most cases you do not need to obtain entry visa to Czech Republic at the consulate beforehand. The period of stay though may be limited by the laws of Czech Republic. You may check what is the allowed period of stay at the Czech Republic consulate in Canada. All other applicants should check information on Czech Republic visa requirements, procedure, application forms, fees and processing timings may be found here: https://czech-republic.visacenter.ca.