Wikipedia:Suggestions for gallery pages

Purposes of Gallery articles
Gallery articles have two main purposes:

Visual organization
The gallery provides a visually improved means of browsing related articles that would be difficult to browse as an unillustrated list or category.

Organization
The gallery helps to organize related articles in a straightforward way. It helps readers to more quickly find what they need. Instead of having to read through a block of text, the reader can identify the subject of his interest via a visual representation of the subject. This is especially beneficial, if the readers main interest lies in the article he or she is looking for and not an navigational list itself.

Introduction
The introduction of a gallery article should typically be one or two sentences long, stating what the gallery depicts and briefly explaining into what subsections (if any) the gallery article is divided into.

Images
The images should be arranged using gallery tags or a template such as. The following are examples:

Example 2: Multiple image template
which produces

Important notes
In order to comply with WP:NOTGALLERY#4., a gallery article must contain accompanying text, such as an introduction and a clearly defined scope.

List of gallery articles

 * Gallery of coats of arms of the United Kingdom and dependencies
 * Gallery of country coats of arms
 * Gallery of curves
 * Gallery of sovereign-state flags