A Bible cross-reference visualization is a chart that draws every cross reference in the Bible as a line, arc, or graph edge between two verses. The famous Harrison-Römhild version plots 63,779 of them along a single horizontal axis — once you know how to read it, the whole 31,102-verse structure of Scripture's internal relationships becomes visible in a single image.
This page explains what those visualizations actually encode, why the dataset has the size it does, how to read the arc diagram step by step, and what you can learn from seeing it that a written list cannot show.
What Is a Bible Cross Reference Visualization?
A Bible cross reference visualization is any chart that turns the connections between verses into visual elements. The most common form is the arc diagram: every verse arranged in order along a horizontal axis, with a colored arc drawn for each cross-referenced pair. There are also network graphs (each verse as a node, each link as an edge), chord diagrams (verses around a circle), heatmaps (chapter-by-chapter density), and geographic maps (where biblical places are linked).
The point of any of these is the same: cross references are a network, and networks have shapes. A list of 63,779 verse pairs is unreadable. The same data laid out spatially is immediately legible. You can see at a glance which chapters have the most connections, which connections reach the farthest, and where the dense corridors run across the canon.
For the historical lineage of the form — Harrison, Römhild, viz.bible, OpenBible's labs page, and others — see a short history of Bible cross reference visualizations.
The Famous Original: Harrison & Römhild (2007)
The visualization that defined the genre was created in 2007 by designer Chris Harrison and Lutheran pastor Christoph Römhild. Römhild had spent years assembling and weighting a dataset of 63,779 cross references, drawn from the Treasury of Scripture Knowledge and other study-Bible traditions. Harrison turned the dataset into an arc diagram: every verse from Genesis 1:1 to Revelation 22:21 laid along a single baseline, and every cross reference drawn as a colored arc between two positions.
The image went everywhere. Online religious communities shared it; data-visualization courses cited it as a teaching example; the print version, sold under the title Frameable Faith, ended up on church and seminary walls. Almost every subsequent Bible cross-reference visualization — including this site — owes the original something.
The colored curves show cross-references mapped along a horizontal axis of biblical verses. Each colored arc connects two chapters of the Bible… Longer lines therefore connect verses that are farther apart. — Chris Harrison, on the original visualization
The visualization on the homepage of this site uses the same dataset and the same arc-diagram form. The interactive features — hover, filter by testament, bar-chart density along the baseline — are the modern extensions.
How to Read an Arc Diagram
Four visual encodings carry almost all the information. Once you can name each one, the whole image becomes legible.
The horizontal axis is the entire Bible. Every verse appears once, in canonical order. Genesis 1:1 sits at the far left; Revelation 22:21 at the far right. The position of each verse is its absolute index from 0 to 31,101.
Each arc is one cross reference. An arc connects the two verses involved. The width of the arc on the baseline equals the distance between the two verses; the height of the arc above the baseline is proportional to that distance, so long-range connections rise higher than short-range ones. A short arc means two verses are close together in the canon — usually within the same book, often within the same chapter. A tall, sweeping arc means the two verses sit far apart, often crossing the Old Testament / New Testament boundary.
Color encodes distance. Short links run cool — purple and blue. Medium-range links shift to green and yellow. The longest links, the ones that connect Genesis to Revelation or the Pentateuch to the Gospels, warm to orange and red. The color palette is deliberate: the eye reads the warmer arcs first, which is where most of the OT-NT relationships live.
The bar chart along the baseline shows density. Each chapter has a vertical bar; the bar's height equals the number of cross references involving any verse in that chapter. Tall bars mark the chapters doing the heavy lifting in the network — Psalms 22, Isaiah 53, Matthew 27, John 19, Hebrews. Hovering any bar in the live visualization isolates that chapter's threads from the rest of the image.
What the Visualization Reveals That a List Cannot
The visualization makes several patterns visible that a written cross-reference list will never expose.
The OT-NT corridor. The single most striking visual feature is the dense band of red and orange arcs sweeping from the right half of the Old Testament — Isaiah, Psalms, the Minor Prophets — toward the Gospels and Pauline epistles. This is the visible record of how heavily the New Testament writers leaned on the Hebrew Scriptures. You can see at a glance that the New Testament is, structurally, a continuation of an argument that began centuries earlier.
The Psalter as a hub. The Psalms light up with both incoming and outgoing connections. The book functions as a citation hub for the rest of the canon — quoted heavily by the New Testament, echoing the wisdom and prophetic literature, and frequently cross-referenced within itself.
Chapter-by-chapter unevenness. Some chapters carry thirty or forty times the cross-reference load of others. The density bars expose this immediately. Genesis 1, Isaiah 53, Psalm 22, Matthew 5, John 1, Hebrews 11 — these are the canon's load-bearing chapters in cross-reference terms. The visualization explains why those chapters get disproportionate attention in commentaries: they are wired into the rest of the Bible more densely than their neighbors.
Quiet regions. The visualization is just as informative in its emptier sections. Long stretches of the historical books, parts of the Minor Prophets, the genealogies, and the legal codes show comparatively sparse arc density. The data is reminding you which sections the cross-reference tradition has historically given less attention to — useful context the next time you study one of them.
The 63,779 Number: Why Not 340,000 or 500,000?
Three different counts dominate the Bible cross-reference world, and the difference matters when you read a visualization.
The Treasury of Scripture Knowledge, R.A. Torrey's 1830s compilation, contains roughly 500,000 entries. OpenBible's modern open dataset trims and de-duplicates that material down to about 340,000. The Harrison-Römhild dataset — the one used in the original visualization and on this site — applies a more aggressive curatorial filter. Römhild scored each potential connection for confidence and discarded the weakest ones, leaving 63,779 well-attested links.
Visualizing 500,000 arcs at once would be unreadable: the chart would fill with noise. 63,779 is roughly the upper bound for what an arc diagram can show legibly. The curation is doing real work — what you see in the image is the subset of connections that multiple traditions of careful readers have agreed on. For the full statistical breakdown, see Bible cross references by the numbers.
Other Visualizations Worth Knowing
Several other projects have approached the same data with different visual strategies.
OpenBible's labs visualization uses the same arc form with a different color scheme: blue arcs land in the Old Testament, red in the New Testament, purple within the same book, gray within the same chapter. It uses the larger 340,000-reference dataset.
Viz.Bible, a project by data analyst Robert Rouse, remade the original visualization with modernized data and added several companion charts — chapter-by-chapter dashboards, Old Testament citation tracking in the New Testament, and book-by-book breakdowns. It is the most rigorous modern descendant of the Harrison original.
The Tableau Public “Bible Cross References” workbook, also by Rouse, offers interactive filtering at the chapter and book level.
Get Proselytized offers a multi-visualization gallery covering the 340,000-reference set with arc diagrams, network graphs, and geographic maps.
For the chronological history of how these projects built on each other, see a short history of Bible cross reference visualizations.
Try It Yourself
Reading about an arc diagram is less efficient than looking at one. The interactive visualization on this site uses the Harrison-Römhild dataset, supports hover-to-isolate on every chapter, and lets you filter by testament. The methodology page documents the exact dataset and the design choices in detail.
Three short experiments will calibrate your eye fast:
Hover over Psalm 22 and watch the connections light up. You should see strong threads reaching forward into the Gospel passion narratives — most prominently to Matthew 27 and John 19. The visualization is showing you, in one gesture, why Psalm 22 is the messianic Psalm.
Hover over Isaiah and follow the warm-colored arcs. Many of them land in the Gospels and in Romans, Hebrews, and 1 Peter. The density of those connections is the visual evidence of how heavily the New Testament writers built on Isaiah.
Hover over Genesis 1 and Genesis 2. You will see short cool arcs to the rest of Genesis and Exodus, plus a small number of long warm arcs reaching all the way to John 1, Romans 5, and Revelation 21. Those are the thematic echoes that knit the canon's first chapters to its last.
Limitations of the Visualization Approach
An arc diagram makes some things visible and other things invisible. It is worth being clear about both.
What it shows well: density, distance, the asymmetry of OT-NT citation traffic, the load-bearing chapters, the emptier regions of the canon.
What it does not show: the type of each connection. An arc from Isaiah 53 to 1 Peter 2 might be a direct quotation; an arc from Genesis 2 to Hebrews 4 might be a thematic echo; the visualization treats them the same way. For the four-type framework, you still need the kind of reading walked through in how Bible cross references work.
What it deliberately omits: weaker connections. The 63,779-link dataset is curated, not exhaustive. Some real-but-disputed connections are not in the image. If you want maximum coverage, the underlying Treasury of Scripture Knowledge with its 500,000 entries is the place to go — but you will need to read it, not look at it.
The visualization is a map, not the territory. It is meant to make the territory navigable, then send you back into the text.
FAQ About Bible Cross Reference Visualizations
What is a Bible cross reference visualization?
A chart that displays the relationships between Bible verses as visual lines or arcs. The most common form is the arc diagram: every verse arranged along a horizontal axis, with a colored arc drawn for each cross reference.
How do you read a Bible cross reference arc diagram?
The horizontal axis is the entire Bible from Genesis to Revelation. Each arc connects two cross-referenced verses. Arc width and height correspond to the distance between them. Color encodes that distance: short links run cool (blue/purple), long links warm to orange and red. Bar height along the baseline shows how many connections each chapter carries.
Why 63,779 cross references and not 340,000?
The Harrison-Römhild dataset is a curated, confidence-weighted subset. Römhild discarded the weakest connections, leaving 63,779 well-attested links — roughly the upper bound for what an arc diagram can show legibly. OpenBible's larger 340,000-reference dataset preserves more connections, including weaker ones.
Who created the original Bible cross reference visualization?
Designer Chris Harrison and Lutheran pastor Christoph Römhild, in 2007. Römhild compiled and weighted the underlying dataset; Harrison designed the arc-diagram representation. The image has been widely shared and sold as a poster titled Frameable Faith. The original is available at chrisharrison.net.