After Roman numerals, even though they have the value of ordinals.
After MS and similar symbols.
In technical matter, after the recognized abbreviations for linguistic epochs. IE (Indo-European), MHG (Middle High German)
and after titles of well-known publications indicated by initials such as AAAPS (Annals of the American Academy of Political Science).
When a parenthesis forms the end of a declarative sentence the period is placed outside the parenthesis, as in the preceding example. A period is placed inside a parenthesis only in two cases.
1. After an abbreviation.
This was 50 years ago (i.e. 1860 A.D.)
2. At the end of an independent sentence lying entirely within the parenthesis.
Lincoln was at the height of his powers in 1860 (He was elected to the presidency at this time.)
When a sentence ends with a quotation, the period always goes inside the quotation marks.