Most buildings aren't just shells; they are fully decorated.
Open the Lilyville ZIP file you downloaded. Drag and drop the internal folder (usually named "Lilyville") directly into the saves folder. lilyville map download java
Most versions of Lilyville were built for older versions of Minecraft (like 1.12.2 or 1.14.4). While you can open them in newer versions, some blocks might change or break. Most buildings aren't just shells; they are fully decorated