Are the Archaea more similar to bacteria or to eukaryotes?

Question

The domain Archaea contains some of the most unusual organisms on Earth. Scientists are finding that not only are the Archaea found in extreme habitats such as thermal vents, they are also much more numerous in ordinary habitats than originally thought.

Answer 1

Actually they are more closely related to eukaryotes according to 16S rRNA analysis, which is currently the gold standard of phylogeny.

While they are prokaryotic cells, they have several cellular similarities with eukaryotes not found in bacteria (TATA-containing promoters, RNA polymerase similarities, ribosome sensitivity to antibiotics .  .  . )

Answer 2

closer to bacteria, it used to be a member of monera kingdom. Since they have some characteristics which a typical bacteria do not have, they have been taken out and form their own group.