I don't know the name of this Beethoven work!!!!! Help please!!!?

There's an orchestral work of Beethoven's that i like very much, but i can't remember what it's called. I believe it's a symphony (maybe not), but if it is, it definitely isn't as well known as others such as the 5th or 9th symphonies. It's very legato and slow, and i know it's in a minor key. I know my description's pretty vague, but if anyone has a idea of what it might be or can give me a list of possibilities, that would be awesome!!!! thanks