I heard that the Rambam in his commentary to the Mishna mentioned cases where the custom of the place was different, one such place being יָוָן, where men didn't cover their heads with their tallitot, ...
The Gemara says you have to tie no fewer than 7 chulyos and no more than 13. According to most shitas, 13 is the ideal. My question is, according to the Rambam, can you do whatever you want - 7 or 13? ...
I've heard that Yemenite Jews follow the Rambam for halacha generally, and Wikipedia concurs. The Rambam writes that one must use a sheep's horn as the shofar on Rosh Hashana. Shulchan Aruch is less ...