Vestige Museum theme comes with Custom widget created specially for the theme. To set the Widget go to Appearance > Widgets.
List of some included Widgets
- Upcoming Events
- Upcoming Exhibitions
- and many more…
To use widgets, drag your widget into the sidebars and footers
Kindly refer to How to Setup and Use Widget.
Additional Information : WordPress Widgets – Codex for more information on how to use WordPress Widgets.