diff --git a/cmd/resolve-state/main.go b/cmd/resolve-state/main.go
index d6db72436..9988a2411 100644
--- a/cmd/resolve-state/main.go
+++ b/cmd/resolve-state/main.go
@@ -32,6 +32,7 @@ import (
 var roomVersion = flag.String("roomversion", "5", "the room version to parse events as")
 var filterType = flag.String("filtertype", "", "the event types to filter on")
 var difference = flag.Bool("difference", false, "whether to calculate the difference between snapshots")
+var roomID = flag.String("room_id", "", "roomID to get the state for")
 
 // dummyQuerier implements QuerySenderIDAPI. Does **NOT** do any "magic" for pseudoID rooms
 // to avoid having to "start" a full roomserver API.
@@ -58,8 +59,6 @@ func main() {
 
 	args := flag.Args()
 
-	fmt.Println("Room version", *roomVersion)
-
 	snapshotNIDs := []types.StateSnapshotNID{}
 	for _, arg := range args {
 		if i, err := strconv.Atoi(arg); err == nil {
@@ -89,6 +88,24 @@ func main() {
 	roomInfo := &types.RoomInfo{
 		RoomVersion: gomatrixserverlib.RoomVersion(*roomVersion),
 	}
+	if *roomID != "" {
+		roomInfo, err = roomserverDB.RoomInfo(ctx, *roomID)
+		if err != nil {
+			panic(err)
+		}
+		if roomInfo == nil {
+			panic("no room found")
+		}
+
+		snapshotNIDs, err = roomserverDB.GetAllStateSnapshots(ctx, roomInfo.RoomNID)
+		if err != nil {
+			panic(err)
+		}
+
+	}
+
+	fmt.Println("Room version", roomInfo.RoomVersion)
+
 	stateres := state.NewStateResolution(roomserverDB, roomInfo, rsAPI)
 
 	fmt.Println("Fetching", len(snapshotNIDs), "snapshot NIDs")
@@ -152,7 +169,8 @@ func main() {
 	}
 
 	var stateEntries []types.StateEntry
-	for _, snapshotNID := range snapshotNIDs {
+	for i, snapshotNID := range snapshotNIDs {
+		fmt.Printf("\r \a %d of %d", i, len(snapshotNIDs))
 		var entries []types.StateEntry
 		entries, err = stateres.LoadStateAtSnapshot(ctx, snapshotNID)
 		if err != nil {
@@ -160,6 +178,7 @@ func main() {
 		}
 		stateEntries = append(stateEntries, entries...)
 	}
+	fmt.Println()
 
 	eventNIDMap := map[types.EventNID]struct{}{}
 	for _, entry := range stateEntries {
diff --git a/roomserver/storage/interface.go b/roomserver/storage/interface.go
index 0638252b2..4d758d2ca 100644
--- a/roomserver/storage/interface.go
+++ b/roomserver/storage/interface.go
@@ -30,6 +30,7 @@ import (
 
 type Database interface {
 	UserRoomKeys
+	GetAllStateSnapshots(ctx context.Context, roomNID types.RoomNID) ([]types.StateSnapshotNID, error)
 	// Do we support processing input events for more than one room at a time?
 	SupportsConcurrentRoomInputs() bool
 	AssignRoomNID(ctx context.Context, roomID spec.RoomID, roomVersion gomatrixserverlib.RoomVersion) (roomNID types.RoomNID, err error)
diff --git a/roomserver/storage/postgres/state_snapshot_table.go b/roomserver/storage/postgres/state_snapshot_table.go
index 32ed06a13..f99615872 100644
--- a/roomserver/storage/postgres/state_snapshot_table.go
+++ b/roomserver/storage/postgres/state_snapshot_table.go
@@ -21,6 +21,7 @@ import (
 	"fmt"
 
 	"github.com/lib/pq"
+	"github.com/matrix-org/dendrite/internal"
 	"github.com/matrix-org/gomatrixserverlib"
 	"github.com/matrix-org/util"
 
@@ -114,11 +115,14 @@ WHERE re.event_id = ANY($2)
 
 `
 
+const getAllSnapshotsSQL = "SELECT state_snapshot_nid FROM roomserver_state_snapshots WHERE room_nid = $1"
+
 type stateSnapshotStatements struct {
 	insertStateStmt                               *sql.Stmt
 	bulkSelectStateBlockNIDsStmt                  *sql.Stmt
 	bulkSelectStateForHistoryVisibilityStmt       *sql.Stmt
 	bulktSelectMembershipForHistoryVisibilityStmt *sql.Stmt
+	getAllSnapshotsStmt                           *sql.Stmt
 }
 
 func CreateStateSnapshotTable(db *sql.DB) error {
@@ -134,9 +138,32 @@ func PrepareStateSnapshotTable(db *sql.DB) (*stateSnapshotStatements, error) {
 		{&s.bulkSelectStateBlockNIDsStmt, bulkSelectStateBlockNIDsSQL},
 		{&s.bulkSelectStateForHistoryVisibilityStmt, bulkSelectStateForHistoryVisibilitySQL},
 		{&s.bulktSelectMembershipForHistoryVisibilityStmt, bulkSelectMembershipForHistoryVisibilitySQL},
+		{&s.getAllSnapshotsStmt, getAllSnapshotsSQL},
 	}.Prepare(db)
 }
 
+func (s *stateSnapshotStatements) GetAllStateSnapshots(ctx context.Context, txn *sql.Tx, roomNID types.RoomNID) ([]types.StateSnapshotNID, error) {
+	stmt := sqlutil.TxStmt(txn, s.getAllSnapshotsStmt)
+
+	rows, err := stmt.QueryContext(ctx, roomNID)
+	if err != nil {
+		return nil, err
+	}
+	defer internal.CloseAndLogIfError(ctx, rows, "failed to close rows")
+
+	nids := make([]types.StateSnapshotNID, 0, 2000)
+	var nid types.StateSnapshotNID
+
+	for rows.Next() {
+		if err := rows.Scan(&nid); err != nil {
+			return nil, err
+		}
+		nids = append(nids, nid)
+	}
+
+	return nids, rows.Err()
+}
+
 func (s *stateSnapshotStatements) InsertState(
 	ctx context.Context, txn *sql.Tx, roomNID types.RoomNID, nids types.StateBlockNIDs,
 ) (stateNID types.StateSnapshotNID, err error) {
diff --git a/roomserver/storage/postgres/storage.go b/roomserver/storage/postgres/storage.go
index c5c206cfb..c2d35f43b 100644
--- a/roomserver/storage/postgres/storage.go
+++ b/roomserver/storage/postgres/storage.go
@@ -23,6 +23,7 @@ import (
 
 	// Import the postgres database driver.
 	_ "github.com/lib/pq"
+	"github.com/matrix-org/dendrite/roomserver/types"
 
 	"github.com/matrix-org/dendrite/internal/caching"
 	"github.com/matrix-org/dendrite/internal/sqlutil"
@@ -36,6 +37,10 @@ type Database struct {
 	shared.Database
 }
 
+func (d *Database) GetAllStateSnapshots(ctx context.Context, roomNID types.RoomNID) ([]types.StateSnapshotNID, error) {
+	return d.StateSnapshotTable.GetAllStateSnapshots(ctx, nil, roomNID)
+}
+
 // Open a postgres database.
 func Open(ctx context.Context, conMan *sqlutil.Connections, dbProperties *config.DatabaseOptions, cache caching.RoomServerCaches) (*Database, error) {
 	var d Database
diff --git a/roomserver/storage/sqlite3/state_snapshot_table.go b/roomserver/storage/sqlite3/state_snapshot_table.go
index 2edff0ba8..c9c49b766 100644
--- a/roomserver/storage/sqlite3/state_snapshot_table.go
+++ b/roomserver/storage/sqlite3/state_snapshot_table.go
@@ -181,3 +181,7 @@ func (s *stateSnapshotStatements) selectStateBlockNIDsForRoomNID(
 
 	return res, rows.Err()
 }
+
+func (s *stateSnapshotStatements) GetAllStateSnapshots(ctx context.Context, txn *sql.Tx, roomNID types.RoomNID) ([]types.StateSnapshotNID, error) {
+	return []types.StateSnapshotNID{}, fmt.Errorf("not implemented")
+}
diff --git a/roomserver/storage/sqlite3/storage.go b/roomserver/storage/sqlite3/storage.go
index 98d88f923..6350a1237 100644
--- a/roomserver/storage/sqlite3/storage.go
+++ b/roomserver/storage/sqlite3/storage.go
@@ -35,6 +35,10 @@ type Database struct {
 	shared.Database
 }
 
+func (d *Database) GetAllStateSnapshots(ctx context.Context, roomNID types.RoomNID) ([]types.StateSnapshotNID, error) {
+	return []types.StateSnapshotNID{}, fmt.Errorf("not implemented")
+}
+
 // Open a sqlite database.
 func Open(ctx context.Context, conMan *sqlutil.Connections, dbProperties *config.DatabaseOptions, cache caching.RoomServerCaches) (*Database, error) {
 	var d Database
diff --git a/roomserver/storage/tables/interface.go b/roomserver/storage/tables/interface.go
index 0ae064e6b..a366a9c7b 100644
--- a/roomserver/storage/tables/interface.go
+++ b/roomserver/storage/tables/interface.go
@@ -96,6 +96,8 @@ type StateSnapshot interface {
 	BulkSelectMembershipForHistoryVisibility(
 		ctx context.Context, txn *sql.Tx, userNID types.EventStateKeyNID, roomInfo *types.RoomInfo, eventIDs ...string,
 	) (map[string]*types.HeaderedEvent, error)
+
+	GetAllStateSnapshots(ctx context.Context, txn *sql.Tx, roomNID types.RoomNID) ([]types.StateSnapshotNID, error)
 }
 
 type StateBlock interface {