I think you can see every day or at least at these two days a week when no entrance fee is to pay a lot of students sitting in the halls of the Glypthotek painting or drawing a sculpture or one of these amazing drawings.
On the photo you see one of the halls where mainly wortks of Rodin are located.
A great museum with special expositions from RODIN and a lot of other exponents from egypt and rome. Besides a fantastic collection of paintings.
And: Wednesdays and Sundays entrance free
I didn´t have a lot time in Copenhagen, so I only saw the Glyptothek and Toussauds Wax museum, but there are a lot of more great museums in Copenhagen, it´s amazing.
Glyptoteket is a massive collection of art which is really special. You should come here if you are interested in art. In the photo is Medusa. She's the one if you look into her eyes you will turn to stone. Looks like she's the one that turned to stone though!
One of the great art museums of Europe, this museum has a combination of antiquities and European masters.
Immerse yourself with awesome art works from Ancient Egypt (they have mummies), Rome (vast collection of sculptures),and many more!
The admission is free on Sundays.
I didn't get a chance to go in here, but this is a well known art gallery/museum, and is well worth the visit by all accounts. It's located near Tivoli.
This is again from Glyptoteket. As you can see its really beautiful, its nice just to walk around. its very central, just behind Tivoli.
The Ny Carlsberg Museum is fabulous! It is definately a must see on any museum lovers list! The building itself is a piece of artwork! Don't miss it!