Vanitas Still Life (Memento Mori)

Item

Item sets
Books
Skulls
Candles
Media
https://dbi5a5cdy48wt.cloudfront.net/loris/co12/ago.18252.jp2/full/680,/0/default.jpg
Title
Vanitas Still Life (Memento Mori)
Creator
Wallerant Vaillant
Date Created
1660-1675
Location
Dutch
Publisher
Art Gallery of Ontario
Identifier
88/160
Medium
mezzotint with etching on paper
Physical Dimensions
23.5 x 17.6 cm
Source
https://ago.ca/collection/object/88/160
focus
What kind of alcove is this? They seem to be popular in memento mori art.