I'm studying a group of Germans that immigrated to the United States around 1860 to the mid-1880s. My source for their birth place is their local court naturalization papers on FamilySearch. Many of them say they were born in Werdau -- one record says "born in Werdau in the County of Zwickau in Germany". (This is consistent with what I've learned from local histories -- the town I'm studying recruited many immigrants for their skills in the weaving industries.)
The online version of Volume V28, Page 522 of the 1911 Encyclopedia Britannica has this entry for Werdau:
WERDAU, a town of Germany, in the kingdom of Saxony, on the Pleisse, in the industrial district of Zwickau, and 40 M. S. of Leipzig. Pop. (1905) 19,473. Its chief industries are cotton and wool-spinning and the weaving of cloth, but machinery of various kinds, paper and a few other articles are also manufactured. In addition to the usual schools, Werdau contains a weaving-school. The town is mentioned as early as 1304 and in 1398 it was purchased by the margrave of Meissen, who afterwards became elector of Saxony. See Stichard, Chronik der Fabrikstadt Werdau (2nd ed., Werdau, 1865). End of Article: WERDAU
The entry on the online Meyers Gazetteer is Werdau 2) Werdau, Zwickau, Zwickau, Sachsen.
Many members of this group were also members of the local Lutheran church in the US (in Massachusetts).
FamilySearch's website seems to have little coverage. I have found some Werdau-born people on FamilySearch, but they are 'strays' (people born in Werdau who turn up in some extracted burial records from other areas of Germany).
The FamilySearch catalog has some church records for Werdau, for which one can order FHL microfilm, but they are LDS records (no surprise there), not Lutheran.
What online resources (indexes, transcriptions) are available for Lutheran parish records in Germany for this time period?