Photograph by Unknown author Unknown author, Public domain. Via
Wikimedia Commons.
Mount St. Mary's Academy and Convent
Listed on the National Register of Historic Places in 1974. 13 historic topographic surveys show this location, the earliest from 1888.
From the record
“Mount Saint Mary's Convent and Academy, originally the Sacred Heart Convent and Holy Angels Orphanage and previously Mount St. Mary's Convent and Orphan Asylum, and also known as Mount Saint Mary's Academy and Convent, is the only extant original orphanage in California and commemorates the Sisters of Mercy, in Grass Valley, Nevada County, California.”
Wikipedia article Mount Saint Mary's Convent and Academy, CC BY-SA 4.0.
One of 22 National Register listings published here for Nevada County · listed in 1974 · category: Building.
National Register reference number.74000543- the number the National Park Service assigned this property when it was listed, and the key its nomination file is catalogued under at the National Archives.
Then and now
1888 to 1998
The ground this property stands on, surveyed
110 years apart. Drag the handle to wipe between them. Both sheets are
United States Geological Survey originals; neither has been altered.
18881998
Fires near this property
922 since 1992
Regional context, not property-specific
evidence. The
federal wildfire occurrence database
lists 922 fires within 5 miles of Mount St. Mary's Academy and Convent
between 1992 and 2020, burning about 3,066 acres in total. 12 started naturally. 38 were recorded as arson.
Distance is straight-line from the map coordinates, so a fire counted
here may appear on a neighbouring settlement's page as well.
Reported cause
Fires
Missing data/not specified/undetermined
362
Debris and open burning
219
Equipment and vehicle use
166
Misuse of fire by a minor
46
Smoking
40
Arson/incendiarism
38
Power generation/transmission/distribution
26
Natural
12
Recreation and ceremony
10
Other causes
3
The most recent of
them, most recent first, with the day each was reported and the service
that recorded it.
Date
Cause
Size
Reported by
Name on the report
9 September 2019
Misuse of fire by a minor
under an acre
Nevada-Yuba-Placer Unit
SNMH CRISIS STABILIZATION
9 September 2016
Missing data/not specified/undetermined
under an acre
California Department of Forestry & Fire Protection
Regional context, not property-specific
evidence. The federal mineral resources record lists
960 workings within 5 miles of Mount St. Mary's Academy and Convent: 521 past producers, 324 occurrences, 81 unknowns, 18 producers.
18 still produce. What was taken out: Gold, Chromium, Silver, Copper. Distance is straight-line from the
map coordinates, so a quarry counted here may appear on a neighbouring
settlement's page as well.
United States Geological Survey topographic
sheets whose coverage includes this point. Matched by taking the coordinate the National Park Service records for this property, then
testing that coordinate against the published boundary of every sheet.
Other National Register properties close
enough to walk or drive between, ordered by distance from this one. Both
positions come from the same geocoding pass that matched these properties
to their map sheets.
Listing record. National Park Service National Register of Historic Places, listed-properties dataset, current to 2026-05-22.
Map join. Address geocoded through the United States Census geocoder, then tested against the published boundary of every sheet in the USGS Historical Topographic Map Collection.
How this page is made. Listing fields come from federal records; map-sheet coverage is a labelled coordinate-to-boundary calculation, not a source-field claim.
Wildfire. Short, Karen C. 2022. Spatial wildfire occurrence data for the United States, 1992-2020 [FPA_FOD_20221014]. 6th Edition. Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2013-0009.6 Collected with United States Government funding and usable without additional permissions or fees.
Mines and quarries. USGS Mineral Resources Data System (MRDS) https://mrdata.usgs.gov/mrds/ A work of the United States government, no copyright under 17 U.S.C. 105.
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