Image Block

Images can have a caption text like this. This is an image size small. Checking the "Show credit" checkbox will show the photographers name in the lower right corner of the image.

This is an image size medium.

This is an image size large with no padding above.

It's also possible to show a 1 px border around an image. The color of the border can be changed under Design > General > UI colors > Border
Use the cards block for images in multiple columns
The Cards block is versatile and can be also used simply for showing multiple image on the page.