Lumen is a unique and creative full screen WordPress theme ideal for many different types of websites. The theme has a minimalist style that truly puts your content into focus. This theme uses different gallery templates for showcasing your photographs. There is also a Thumbnail Gallery plugin that will help you add thumbnails.
This unique WP theme includes 12 custom backgrounds you can use, or you may upload a custom one. The thumbnail gallery is customizable and you can insert it in any page or post. Using this theme, you can choose which categories to show on each portfolio page so you can have multiple portfolios with different items.