Key takeaways
- Step 1: Ring the fallen bell by striking it once. Reason: the bell’s resonance reveals three floor glyphs you need to read, and they fade in about 20 seconds.
- Step 2: Note the order the glyphs light up. It’s always the same three-glyph pattern per playthrough, but the order is randomized between runs, so you can’t memorize it from a video.
- Step 3: Step on the floor plates in that order, then place the Hollow Key in the altar’s recessed slot. Reason: the plates disarm the altar’s rejection field; placing the key without them just returns it to your inventory.
- Step 4: Offer the reeds and fitting as at the Threshold Altar. The altar accepts them in any socket order — the Hourglass Altar doesn’t enforce a layout.
Which Altars Matter in the Cronos Chapel
The Cronos Chapel has three altar stations — the Threshold Altar, the Hourglass Altar, and the Sundered Altar — and you can finish all of them in a single run if you visit them in that order and carry four Cinder Reeds, two Brass Fittings, and one Hollow Key before you enter. Skipping the Hourglass Altar locks you out of the optional Chronomancer’s Sigil for the rest of the run, and returning later costs roughly 25 minutes of backtracking through the nave. This guide maps altar locations, required items, and puzzle steps in sequence so you clear the chapel once and collect everything.
What the Chapel Section Actually Asks of You
The chapel is a self-contained puzzle zone with three altars, each gated behind an item check and one timing puzzle. The game’s official patch notes describe the chapel as “a contiguous puzzle wing with no respawn checkpoints between altars,” which is the key fact most players miss: dying before the final altar sends you back to the nave entrance with your altar progress intact but your consumables spent.
Per the in-game codex entry for the chapel, each altar accepts a specific offering and rejects duplicates. Offer a second Cinder Reed at the Threshold Altar and it simply returns to your inventory — no loss, no progress. That’s a forgiving design, but it means you can’t brute-force the sequence.
Quick Comparison: The Three Altars
| Altar | Location | Required Items | Optional Reward | Time (in-run) |
|---|---|---|---|---|
| Threshold Altar | Nave, left of the entry arch | 2 Cinder Reeds, 1 Brass Fitting | Chapel Ward (damage reduction, 15 min) | 3–5 min |
| Hourglass Altar | North transept, behind the fallen bell | 2 Cinder Reeds, 1 Brass Fitting, 1 Hollow Key | Chronomancer’s Sigil (unlocks a shortcut) | 8–12 min |
| Sundered Altar | Apse, beneath the cracked rose window | 1 Brass Fitting (the Hollow Key is consumed earlier) | Chapel completion flag + Sigil upgrade | 5–8 min |
The short version: the Threshold Altar is unavoidable, the Hourglass Altar is the one people skip, and the Sundered Altar is where the run ends. Everything below assumes you’re entering with the full kit.
The Threshold Altar: First Station, Easiest Check
The Threshold Altar sits against the west wall of the nave, a few steps left of the arch you walk through on entry. It’s the only altar visible without turning a corner, which is why it’s the natural first stop.
What you need: two Cinder Reeds and one Brass Fitting. Cinder Reeds spawn in the brazier alcoves along the nave and respawn on a five-minute timer, so if you’re short, circle the nave once and check the three alcoves on the right side — they refill faster than the left-side ones in most builds.
The puzzle: place both reeds in the outer sockets, then the Brass Fitting in the center. The altar lights in a fixed left-to-right sequence. If you place the fitting first, the altar resets without consuming anything — no penalty, just reorder and retry.
Why do it first: the Chapel Ward it grants gives 15 minutes of reduced incoming damage, which covers the entire rest of the chapel run. Do the Hourglass Altar first and you’ll fight its bell-maze without the ward, which is where most deaths in this section happen.
The optional pickup here: before you leave the nave, check the alcove behind the third pew row on the right. A Brass Fitting sits there — one of the few free pickups in the chapel, and you’ll want it for the Sundered Altar later.
The Hourglass Altar: The One Everyone Skips
Head through the north transept door and continue past the fallen bell. The Hourglass Altar is mounted on the far wall, partly hidden by the bell’s shadow. It’s easy to walk past because the transept’s main path curves right toward the stairs; the altar is behind you once you commit to that curve.
What you need: two more Cinder Reeds, one Brass Fitting, and the Hollow Key. The Hollow Key drops from the bell-keeper enemy in the transept — it’s a guaranteed drop, not a random one, so if you don’t have it, you haven’t cleared that room yet.
The puzzle, step by step:
- Step 1: Ring the fallen bell by striking it once. Reason: the bell’s resonance reveals three floor glyphs you need to read, and they fade in about 20 seconds.
- Step 2: Note the order the glyphs light up. It’s always the same three-glyph pattern per playthrough, but the order is randomized between runs, so you can’t memorize it from a video.
- Step 3: Step on the floor plates in that order, then place the Hollow Key in the altar’s recessed slot. Reason: the plates disarm the altar’s rejection field; placing the key without them just returns it to your inventory.
- Step 4: Offer the reeds and fitting as at the Threshold Altar. The altar accepts them in any socket order — the Hourglass Altar doesn’t enforce a layout.
The reward worth the detour: the Chronomancer’s Sigil. It doesn’t look like much on pickup, but it permanently opens the short corridor between the transept and the apse, cutting the walk to the Sundered Altar from about four minutes to under one. Miss it and you take the long way every time you re-enter the chapel.
Common mistake: ringing the bell a second time before placing the key. The second ring resets the glyph display and scrambles the order, forcing you to re-read all three. Ring once, read, move.
The Sundered Altar: The Final Station
From the Hourglass Altar, take the Sigil shortcut east into the apse. The Sundered Altar is directly beneath the cracked rose window — the light shaft makes it visible from the transept once you’re through the corridor.
What you need: one Brass Fitting. If you picked up the free one in the nave, you’re covered. The Cinder Reeds aren’t required here; the altar’s sockets are sized differently and reject them.
The puzzle: this one is a light puzzle, not an item puzzle. Three rotating rings surround the altar, and you need to align each ring’s notch with the rose window’s light shaft. The rings move in opposite directions — the outer ring turns clockwise, the inner counter-clockwise — so align the inner ring first, then the middle, then the outer. Working outward-in means you don’t knock your earlier alignments out of position.
Reward: the chapel completion flag and an upgrade to the Chronomancer’s Sigil that lets you fast-travel back to the chapel entrance from anywhere in the wing. The flag itself matters for the region’s overall completion percentage.
What to Carry Before You Enter
| Item | Quantity | Where to Get It | Used At |
|---|---|---|---|
| Cinder Reed | 4 | Brazier alcoves (nave, 5-min respawn) | Threshold + Hourglass |
| Brass Fitting | 3 | Nave alcove pickup + bell-keeper room + transept chest | All three altars |
| Hollow Key | 1 | Guaranteed drop, bell-keeper enemy | Hourglass only |
| Healing consumables | 3–5 | Any prior zone | Bell-maze in the transept |
Three fittings is the number that matters. Two come from fixed pickups and one from the transept chest, so a player who skips the transept chest arrives at the Sundered Altar short one item and has to walk back — the exact backtracking this route is designed to avoid.
How to Choose Your Route
If you’re playing for the first time, take the altars in listed order (Threshold, Hourglass, Sundered). It costs you nothing extra and guarantees the Chapel Ward covers the hardest room.
If you’ve cleared the chapel before and only want the Sigil upgrade, skip straight to the Hourglass Altar — but accept that you’ll do the bell-maze without the ward. Budget 3–5 healing consumables for that route versus 1–2 for the full sequence.
If you’re a completionist chasing the region percentage, the only truly missable item is the Chronomancer’s Sigil’s base form. Everything else — the ward, the flag, the Sigil upgrade — remains obtainable on a repeat visit. So the one thing you can’t afford to skip is the Hourglass Altar on your first pass.
Frequently Asked Questions
Can I do the Cronos Chapel altars in any order?
Technically yes, but the intended order is Threshold, Hourglass, then Sundered. Doing them out of order costs you the Chapel Ward’s damage reduction during the transept bell-maze and, if you skip the Hourglass Altar entirely, permanently costs you the Chronomancer’s Sigil for that run.
How many Cinder Reeds do I need for the whole chapel?
Four: two for the Threshold Altar and two for the Hourglass Altar. The Sundered Altar rejects them. They respawn in the nave brazier alcoves on a five-minute timer, so if you enter short, a single lap of the nave usually tops you up.
Is the Chronomancer’s Sigil worth the detour?
Yes, on a first playthrough. It permanently opens a short corridor between the transept and the apse, cutting the walk to the Sundered Altar from about four minutes to under one, and it upgrades to fast-travel once you finish the chapel.
What happens if I ring the fallen bell twice?
The second ring resets the glyph display and scrambles the order you need to step on the floor plates. Nothing is consumed, but you have to re-read all three glyphs within the 20-second display window. Ring once, read, and move.
Do I lose altar progress if I die in the chapel?
No. Per the game’s official patch notes, the chapel has no respawn checkpoints between altars, so you return to the nave entrance — but completed altars stay completed. What you lose is any consumables you spent, which is why the ward from the Threshold Altar matters so much.
Which altar gives the best reward?
The Hourglass Altar, because the Chronomancer’s Sigil is the only altarpiece reward that changes how you move through the rest of the chapel. The Threshold Altar’s ward is strong but temporary at 15 minutes, and the Sundered Altar’s reward is mainly a completion flag plus the Sigil upgrade.
