Building / Landmark
Ghost Bike Memorial - Marcia Diehl
White ghost bike near Putnam Avenue for Marcia Diehl, a Cambridge folk musician and activist killed while cycling in 2015.
Why it matters
A single canonical record that surfaces on 3 of the network’s properties — the same place, understood through 3 different civic lenses.
Open the full civic recordCurrent pulse, routes, recommendations, and memory
Living object
Now, then, future
Every object is temporal: what it feels like now, what it used to mean, and what it can become next.
Now
Thenquiet enough to notice details. Best now: one good detour.
1822: Orthodox parish just off Central Square, occupying a church building that dates to 1822 — one of the older sanctuaries in this part of Cambridge.
Future2026: America’s 250th — July 4, 2026.
Current modemidday
Historical echoSt. Mary Orthodox Church
Connected eventAmerica’s 250th — July 4, 2026
Pulse
How it feels right now
Current energyquiet enough to notice details
Best nowone good detour
Best timemidday
Central Square
Rain scoremodest
Indoor escapes within a few blocks.
Laptop friendlinesslow
Coffee, libraries, bookstores, and campus edges.
Student presencelow
How strongly the nearby graph reads as campus life.
Tourist pressurelow
Fame, landmark pull, and visitor-facing assets.
Historic densitylight
Older records and historical edges around this object.
Serendipityquiet
Different kinds of things hiding within a short walk.
Turn this into a walk
Routes with a point of view
What should I see next?
Chosen moves from here
The editor's hand
Human recommendations
The Civic Graph Editorial DeskEditorial standard
Look for the older layer before you move on. This object is connected to more than its facade suggests.Emory Washburn →Cambridge History DeskLocal historian
Look for the older layer before you move on. This object is connected to more than its facade suggests.Emory Washburn →
Civic memory
What this meant before
1822St. Mary Orthodox ChurchOrthodox parish just off Central Square, occupying a church building that dates to 1822 — one of the older sanctuaries in this part of Cambridge.1848Deane-Williams HouseHouse dating to 1848 near Central Square, part of Cambridge's inventory of documented mid-nineteenth-century homes.1851Christ the King Presbyterian ChurchPresbyterian congregation on Prospect Street a block from Central Square, worshipping in a church building that has stood since 1851.1866Ernst Flentje HouseAn 1866 house near Central Square that has outlasted most of its contemporaries, a fixed point in the neighborhood's Victorian streetscape.
Plan your visit
Get there
In the graph 1 relationships — first-class data, not links
Explore Ghost Bike Memorial - Marcia Diehl in the interactive Graph Explorer — click to expand every connection →Located in
Nearby what sits within a few minutes’ walk
Building / Landmark · 3 min walk
Ernst Flentje House
Person · 4 min walk
Margaret Fuller
Building / Landmark · 6 min walk
1933 Shell "Spectacular" Sign
Keep exploring graph-powered — every path below is a real relationship, not a guess
NearbyA few minutes’ walk away
Also in Central SquareShares a neighborhood
More landmarksOther landmarks in the graph
Visitors also exploreReached through the same connections
One record, 3 framings cross-property publishing — never duplicated
How we know graph confidence — we explain our certainty, not just assert it
○Source qualityBest source is open reference
○Independent corroboration1 source
✓Human-reviewedEditorially verified
○Institutional backingNo primary source yet
○Record completeness40% of canonical fields present
Sources, by tier
OpenStreetMap node/13123639174 Open reference
The same entity, elsewhere
Graph scores — our north star is relationship density, not page count
Relationship density13
1 connection
Record coverage48
metadata completeness
Graph authority28
centrality + reach + trust
Schema.org JSON-LD — what answer engines read
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