The Faculty of Arts at The University of Karl in Prague, where a student killed 14 people this month, said friday it would remain closed until at least the end of January.
He also said students will not be required to sit exams after the winter period ending on January 12.
A 24-year-old history student opened fire on the faculty on December 21, killing 14 people and then himself. Twenty-five people were injured in the historic city center.
"All assessments (for students) will be conducted on a voluntary basis and the format can be adjusted depending on the circumstances," the faculty said on its website.
"We want to assure you that even if you do not receive any credit for the winter semester, you can continue your studies and successfully complete your program in the future," the faculty added in the announcement.
The mass shooting rocked the afternoon of December 21 as one of the safest places in the world.
The gunman who killed 14 people at a University in Prague on Friday confessed to another double murder in a letter before committing suicide, Czech police said.
The letter was found in David Kozak's home and through it he recounted killing a man and his young daughter in a forest near Prague on December 15, six days before the attack on Karl University.
Police said he was on a list of 4,000 suspects in the killing of two victims.
The Cossack later killed his father, bringing the number of those killed by his hand to 17.
The attack on the university on December 21 was the worst mass shooting in Czech history.
Founded in 1347, Karl University is the oldest and largest in the Czech Republic, and one of the oldest educational institutions in Europe.