How do I position an image at the bottom of div?

Question

I want an html image to be flush with the bottom of a div tag. I can\'t seem to find a way to accomplish this.

Here is my HTML:

Answer 1

Using flexbox:

HTML:

CSS:

.wrapper {
    height: 300px;
    width: 300px;
    display: flex;
    align-items: flex-end;
}

As requested in some comments on another answer, the image can also be horizontally centred with justify-content: center;