# Wikipedia >[Wikipedia](https://wikipedia.org/) is a multilingual free online encyclopedia written and maintained by a community of volunteers, known as Wikipedians, through open collaboration and using a wiki-based editing system called MediaWiki. `Wikipedia` is the largest and most-read reference work in history. ## Installation and Setup ```bash pip install wikipedia ``` ## Document Loader See a [usage example](/docs/modules/data_connection/document_loaders/integrations/wikipedia.html). ```python from langchain.document_loaders import WikipediaLoader ``` ## Retriever See a [usage example](/docs/modules/data_connection/retrievers/integrations/wikipedia.html). ```python from langchain.retrievers import WikipediaRetriever ```