Does anyone know what template this could be.

I really love the wide image layout of these websites but can't seem to find a Squarespace template that I could design that would be similar to these wide, large image grids. I'd be so grateful if anyone knew a template that could work in a similar way to these. Thank you! 

https://www.louiseskadhauge.com/still-life

https://www.maisonpalme.com/neue-seite

I believe that these are both York type templates:

https://www.squarespace.com/templates/york-demo

These are old templates on the old version of Squarespace, this doesn't necessarily matter yet, they are still supported, but these templates don't have the same feature set as the new ones, and can be limited in various different ways.

Depending on your requirements, you can certainly use a new template to have big images, this might be along the right lines:

https://www.squarespace.com/templates/novo-fluid-demo

The top link is built on a member of the 7.0 Brine Family, there are a lot of templates in the family and I can't identify the specific one out of forty it is. If I had to guess it is close to Clay or Foster. 

The lower link as Ziggy said is built on a member of the York Family, there are five  templates in that family, there used to be six but Jones has been discontinued. I think it has been built on York or Jasper.