/usr/include/Poco/MongoDB/ is in libpoco-dev 1.8.0.1-1ubuntu4.
This file is owned by root:root, with mode 0o755.
..
/usr/include/Poco/MongoDB/Array.h
/usr/include/Poco/MongoDB/BSONReader.h
/usr/include/Poco/MongoDB/BSONWriter.h
/usr/include/Poco/MongoDB/Binary.h
/usr/include/Poco/MongoDB/Connection.h
/usr/include/Poco/MongoDB/Cursor.h
/usr/include/Poco/MongoDB/Database.h
/usr/include/Poco/MongoDB/DeleteRequest.h
/usr/include/Poco/MongoDB/Document.h
/usr/include/Poco/MongoDB/Element.h
/usr/include/Poco/MongoDB/GetMoreRequest.h
/usr/include/Poco/MongoDB/InsertRequest.h
/usr/include/Poco/MongoDB/JavaScriptCode.h
/usr/include/Poco/MongoDB/KillCursorsRequest.h
/usr/include/Poco/MongoDB/Message.h
/usr/include/Poco/MongoDB/MessageHeader.h
/usr/include/Poco/MongoDB/MongoDB.h
/usr/include/Poco/MongoDB/ObjectId.h
/usr/include/Poco/MongoDB/PoolableConnectionFactory.h
/usr/include/Poco/MongoDB/QueryRequest.h
/usr/include/Poco/MongoDB/RegularExpression.h
/usr/include/Poco/MongoDB/ReplicaSet.h
/usr/include/Poco/MongoDB/RequestMessage.h
/usr/include/Poco/MongoDB/ResponseMessage.h
/usr/include/Poco/MongoDB/UpdateRequest.h