By 1990, the Census Bureau included more than a dozen ethnic/racial categories on the census, reflecting not only changing social ideas about ethnicity, but the wide variety of immigrants who had come to reside in the United States due to changing historical forces and new immigration laws in the 1960s. With a changing society, more citizens have begun to press for acknowledging multiracial ancestry. The Census Bureau changed its data collection by allowing people to self-identify as more than one ethnicity. Some ethnic groups are concerned about the potential political and economic effects, as federal assistance to historically underserved groups has depended on Census data. According to the Census Bureau, as of 2002, over 75% of all African Americans had multiracial ancestries.
Can people self identify as more than one ethnicity on the US census currently?
The Census Bureau changed its data collection by allowing people to self-identify as more than one ethnicity

A cappella music was originally used in religious music, especially church music as well as anasheed and zemirot. Gregorian chant is an example of a cappella singing, as is the majority of secular vocal music from the Renaissance. The madrigal, up until its development in the early Baroque into an instrumentally-accompanied form, is also usually in a cappella form. Jewish and Christian music were originally a cappella,[citation needed] and this practice has continued in both of these religions as well as in Islam.
What was considered part of A cappella until the Baroque period?
The madrigal

Each camp had its own religious personnel; standard bearers, priestly officers and their assistants, including a haruspex, and housekeepers of shrines and images. A senior magistrate-commander (sometimes even a consul) headed it, his chain of subordinates ran it and a ferocious system of training and discipline ensured that every citizen-soldier knew his duty. As in Rome, whatever gods he served in his own time seem to have been his own business; legionary forts and vici included shrines to household gods, personal deities and deities otherwise unknown. From the earliest Imperial era, citizen legionaries and provincial auxiliaries gave cult to the emperor and his familia on Imperial accessions, anniversaries and their renewal of annual vows. They celebrated Rome's official festivals in absentia, and had the official triads appropriate to their function – in the Empire, Jupiter, Victoria and Concordia were typical. By the early Severan era, the military also offered cult to the Imperial divi, the current emperor's numen, genius and domus (or familia), and special cult to the Empress as "mother of the camp." The near ubiquitous legionary shrines to Mithras of the later Imperial era were not part of official cult until Mithras was absorbed into Solar and Stoic Monism as a focus of military concordia and Imperial loyalty.
Even in other places, of what did the legions keep observance?
Rome's official festivals