GENERAL INDEX to Church Records
General index to marriages prior to 1802 in Grand Duchy of Luxembourg: https://www.familysearch.org/search/image/index?owc=STH8-K6D%3A1501324901%3Fcc%3D2037955&cc=2037955
Also Luxembourg by city: https://www.familysearch.org/search/image/index?owc=https%3A%2F%2Fwww.familysearch.org%2Fplatform%2Frecords%2Fcollections%2F2037955%2Fwaypoints
Index to birth records in Luxembourg City: https://www.familysearch.org/en/search/film/007105394?cat=182732/
Index to church marriage and deaths in Luxembourg CIty: https://www.familysearch.org/en/search/film/007105395?cat=182732&i=0
CHURCH RECORDS
St. NIcolaus: https://www.familysearch.org/en/search/catalog/182732
St. Nicolaus: https://www.familysearch.org/search/image/index?owc=STHC-GP8%3A1500891709%3Fcc%3D2037955&cc=2037955
https://www.familysearch.org/search/image/index?owc=STHC-GP8%3A1500891709%3Fcc%3D2037955&cc=2037955
Index to births St. Nicolaus DGS 7105394 https://www.familysearch.org/ark:/61903/3:1:3QSQ-G9WS-HRYM?cat=182732%2F&i=146&cc=5000012&lang=en/
Card Index to marriages at FamilySearch for St. Nicolaus: https://www.familysearch.org/en/search/catalog/760400
Entries fo Luxembourg St. Nicolaus are entered under Luxemburg-Notre Dame on Matricula and they can be found at this link:
https://data.matricula-online.eu/en/LU/luxemburg/luxemburg-notre-dame/
Card Index to marriages in St. Michel parish: https://www.familysearch.org/en/search/catalog/760403
Card Index to marriages in St. Michel parish Part B: https://www.familysearch.org/en/search/catalog/760405/
Card Index to marriages (partial) St. Jean: https://www.familysearch.org/en/search/catalog/760398
Card Index to marriages St. Ulderic: https://www.familysearch.org/en/search/catalog/760223
Garnison
https://bach-dunn.special.libraries.stthomas.edu/parishcivil/
St. Thomas Index [Available in a FamilySearch Center]
CHURCH RECORDS ON MATRICULA
Stadt Grund: https://data.matricula-online.eu/de/LU/luxemburg/luxemburg-stadtgrund/