A tin tabernacle is like a little house that people used to build a long time ago, out of metal. It's called a "tabernacle" because it was used as a place where people put things that were important to them, like books, religious symbols, and sometimes even food.
Imagine a little metal shed, but instead of keeping gardening tools inside, it's used to hold sacred objects. Tin tabernacles were often built in areas where people didn't have a lot of money, like in small towns or rural areas.
They were also popular because they were easy to build and didn't cost a lot of money. Since they were made of metal, they could stand up to tough weather like rain and snow.
Today, you might see some tin tabernacles in museums or historical parks. Even though they're old, they're like a little time machine that can teach us about how people used to live and what was important to them.