These are two angels and their columns would have been used to place candles on. Apparently angels tended to be placed in pairs from medieval times, but I suppose that they don’t much want to be lonely. They date to around 1500 and were made in the Rhineland region, perhaps in Cologne itself.
The original location of the angels is lost to history, but they would have likely stood either side of an altar. They’re called Leuchterengels in German, the Leuchter means candle and is the same word origin as ‘light’ in English.
I think they’re well decorated without being overstated, it’s just a shame that the heritage of where they were once housed has now been lost.