Attachment image gallery
The Attachment image gallery web part displays a gallery of images stored as unsorted attachments of a specified document. It is useful when you need to display a gallery of images related to a single document, typically the currently displayed one. A typical scenario in which this web part may be useful is e.g. when you need to display images of a product offered in an e-shop.
More information about document attachments in Kentico CMS can be found in Kentico CMS Developer's Guide -> Content management -> File management -> Document attachments.