Final answer:
The four things depicted in 'The Altar' are a woman standing before a low altar, a pole with a double axe and bird, an architectural structure with horns, and a green tree.
Step-by-step explanation:
In Albrecht Dürer's painting 'The Altar', there are four main elements depicted. First, there is a woman standing before a low altar with a hide skirt.
This altar is adorned with a red and white running spiral design, a shallow grey bowl, a painted beaked pitcher, and a two-handled bowl.
Secondly, there is a pole set in a red and white checked base, featuring a double axe and a bird at the top. Lastly, there is an architectural structure with red and white running spirals and four pairs of horns, growing a green tree.