How to center gallery in a page?

HI.

I’ve the same problem.

is there a trick or I must look at something wrong in css files?

Hi

The trick is to set a max-width to the .tiled-gallery class in your css. That way, the margin:auto will work … That did it for my site anyway.

e.g.:
.tiled-gallery {
max-width: 800px;
margin: auto !important;
}