Places of worship
Many Leiden University buildings have a quiet room that can be used for meditation and prayer. You can request the key at the reception of the building in question.
There are many churches, faiths and religious communities represented in Leiden and The Hague.
Leiden University also has a number of religious student associations that you are welcome to join.
Retreat (for meditation or prayer)
Many university buildings have a retreat available, a room that staff and students can use for quiet reflection, meditation or prayer.