AMiBA, a millimeter interferometer like ALMA, was constructed by ASIAA (Academia Sinica Institute of Astronomy and Astrophysics) and National Taiwan University for polarimetry of microwave background radiation and detection of distant clusters of galaxies using the Sunyaev Zeldovich effect. (alma-telescope.jp)
Only last month, Hubble found the most distant cluster of galaxies and «some suspected ancestors of today's galaxies». (newscientist.com)
In the past, astronomers have observed gravitational lensing caused by distant clusters of galaxies. (newscientist.com)