diff --git a/kgpz_web.go b/kgpz_web.go
index 4734f16..bf3b57b 100644
--- a/kgpz_web.go
+++ b/kgpz_web.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"os"
+	"path/filepath"
 
 	"githib.com/Theodor-Springmann-Stiftung/kgpz_web/helpers"
 	"githib.com/Theodor-Springmann-Stiftung/kgpz_web/providers"
@@ -14,9 +15,19 @@ import (
 //		- Setup GitHub webhook if set
 // 3. Serialize XML DATA
 
+const (
+	AGENTS_PATH     = "XML/akteure.xml"
+	PLACES_PATH     = "XML/orte.xml"
+	WORKS_PATH      = "XML/werke.xml"
+	CATEGORIES_PATH = "XML/kategorien.xml"
+)
+
 type KGPZ struct {
 	Config *providers.ConfigProvider
 	Repo   *providers.GitProvider
+	Agents *providers.AgentProvider
+	Places *providers.PlaceProvider
+	Works  *providers.WorkProvider
 }
 
 func NewKGPZ(config *providers.ConfigProvider) *KGPZ {
@@ -63,7 +74,58 @@ func (k *KGPZ) InitRepo() {
 			helpers.LogOnDebug(gp, "GitProvider")
 		}
 	}
+}
 
+func (k *KGPZ) InitAgents() {
+	ap := providers.NewAgentProvider([]string{filepath.Join(k.Config.FolderPath, AGENTS_PATH)})
+	if ap != nil {
+		if err := ap.Load(); err != nil {
+			helpers.LogOnErr(ap, err, "Error loading agents")
+		}
+
+		if k.IsDebug() {
+			helpers.LogOnDebug(ap, "AgentProvider")
+		}
+	}
+}
+
+func (k *KGPZ) InitPlaces() {
+	pp := providers.NewPlaceProvider([]string{filepath.Join(k.Config.FolderPath, PLACES_PATH)})
+	if pp != nil {
+		if err := pp.Load(); err != nil {
+			helpers.LogOnErr(pp, err, "Error loading places")
+		}
+
+		if k.IsDebug() {
+			helpers.LogOnDebug(pp, "PlaceProvider")
+		}
+	}
+}
+
+func (k *KGPZ) InitWorks() {
+	wp := providers.NewWorkProvider([]string{filepath.Join(k.Config.FolderPath, WORKS_PATH)})
+	if wp != nil {
+		if err := wp.Load(); err != nil {
+			helpers.LogOnErr(wp, err, "Error loading works")
+		}
+
+		if k.IsDebug() {
+			helpers.LogOnDebug(wp, "WorkProvider")
+		}
+	}
+}
+
+func (k *KGPZ) InitCategories() {
+	cp := providers.NewCategoryProvider([]string{filepath.Join(k.Config.FolderPath, CATEGORIES_PATH)})
+	if cp != nil {
+		if err := cp.Load(); err != nil {
+			helpers.LogOnErr(cp, err, "Error loading categories")
+		}
+
+		if k.IsDebug() {
+			helpers.LogOnDebug(cp, "CategoryProvider")
+		}
+	}
 }
 
 func main() {
@@ -74,5 +136,8 @@ func main() {
 
 	kgpz := NewKGPZ(cfg)
 	kgpz.InitRepo()
-
+	kgpz.InitAgents()
+	kgpz.InitPlaces()
+	kgpz.InitWorks()
+	kgpz.InitCategories()
 }
diff --git a/providers/agents.go b/providers/agents.go
new file mode 100644
index 0000000..ccbd839
--- /dev/null
+++ b/providers/agents.go
@@ -0,0 +1,47 @@
+package providers
+
+import (
+	"encoding/xml"
+	"fmt"
+)
+
+type AgentProvider struct {
+	XMLProvider[Agents]
+}
+
+type Agent struct {
+	XMLName  xml.Name `xml:"akteur"`
+	ID       string   `xml:"id,attr"`
+	Names    []string `xml:"name"`
+	SortName string   `xml:"sortiername"`
+	Life     string   `xml:"lebensdaten"`
+	GND      string   `xml:"gnd"`
+	AnnotationNote
+}
+
+type Agents struct {
+	XMLName xml.Name `xml:"akteure"`
+	Agents  []Agent  `xml:"akteur"`
+}
+
+func (a Agents) String() string {
+	var res []string
+	for _, agent := range a.Agents {
+		res = append(res, agent.String())
+	}
+
+	return fmt.Sprintf("Agents: %v", res)
+}
+
+func (a Agents) Append(data Agents) Agents {
+	a.Agents = append(a.Agents, data.Agents...)
+	return a
+}
+
+func (a *Agent) String() string {
+	return fmt.Sprintf("ID: %s\nNames: %v\nSortName: %s\nLife: %s\nGND: %s\nAnnotations: %v\nNotes: %v\n", a.ID, a.Names, a.SortName, a.Life, a.GND, a.Annotations, a.Notes)
+}
+
+func NewAgentProvider(paths []string) *AgentProvider {
+	return &AgentProvider{XMLProvider: XMLProvider[Agents]{paths: paths}}
+}
diff --git a/providers/categories.go b/providers/categories.go
new file mode 100644
index 0000000..4c6c0bd
--- /dev/null
+++ b/providers/categories.go
@@ -0,0 +1,44 @@
+package providers
+
+import (
+	"encoding/xml"
+	"fmt"
+)
+
+type CategoryProvider struct {
+	XMLProvider[Categories]
+}
+
+type Categories struct {
+	XMLName  xml.Name   `xml:"kategorien"`
+	Category []Category `xml:"kategorie"`
+}
+
+type Category struct {
+	ID       string   `xml:"id,attr"`
+	Names    []string `xml:"name"`
+	SortName string   `xml:"sortiername"`
+	AnnotationNote
+}
+
+func (c Categories) Append(data Categories) Categories {
+	c.Category = append(c.Category, data.Category...)
+	return c
+}
+
+func (c Categories) String() string {
+	var res []string
+	for _, category := range c.Category {
+		res = append(res, category.String())
+	}
+
+	return fmt.Sprintf("Categories: %v", res)
+}
+
+func (c *Category) String() string {
+	return fmt.Sprintf("ID: %s\nNames: %v\nSortName: %s\nAnnotations: %v\nNotes: %v\n", c.ID, c.Names, c.SortName, c.Annotations, c.Notes)
+}
+
+func NewCategoryProvider(paths []string) *CategoryProvider {
+	return &CategoryProvider{XMLProvider: XMLProvider[Categories]{paths: paths}}
+}
diff --git a/providers/issues.go b/providers/issues.go
new file mode 100644
index 0000000..f9f48f3
--- /dev/null
+++ b/providers/issues.go
@@ -0,0 +1,67 @@
+package providers
+
+import (
+	"encoding/xml"
+	"fmt"
+)
+
+type IssueProvider struct {
+	XMLProvider[Issues]
+}
+
+type Issues struct {
+	XMLName xml.Name `xml:"stuecke"`
+	Issue   []Issue  `xml:"stueck"`
+}
+
+type Issue struct {
+	ID          string       `xml:"id,attr"`
+	Number      IssueNumber  `xml:"nummer"`
+	Datum       KGPZDate     `xml:"datum"`
+	Von         string       `xml:"von"`
+	Bis         string       `xml:"bis"`
+	Additionals []Additional `xml:"beilage"`
+}
+
+type IssueNumber struct {
+	XMLName   xml.Name `xml:"nummer"`
+	Value     string   `xml:",chardata"`
+	Corrected string   `xml:"korrigiert,attr"`
+}
+
+type KGPZDate struct {
+	When      string `xml:"when,attr"`
+	NotBefore string `xml:"notBefore,attr"`
+	NotAfter  string `xml:"notAfter,attr"`
+	From      string `xml:"from,attr"`
+	To        string `xml:"to,attr"`
+}
+
+type Additional struct {
+	XMLName xml.Name `xml:"beilage"`
+	Nummer  string   `xml:"nummer,attr"`
+	Von     string   `xml:"von"`
+	Bis     string   `xml:"bis"`
+}
+
+func (i Issues) Append(data Issues) Issues {
+	i.Issue = append(i.Issue, data.Issue...)
+	return i
+}
+
+func (i Issues) String() string {
+	var res []string
+	for _, issue := range i.Issue {
+		res = append(res, issue.String())
+	}
+
+	return fmt.Sprintf("Issues: %v", res)
+}
+
+func (i *Issue) String() string {
+	return fmt.Sprintf("ID: %s\nNumber: %v\nDatum: %v\nVon: %s\nBis: %s\nAdditionals: %v\n", i.ID, i.Number, i.Datum, i.Von, i.Bis, i.Additionals)
+}
+
+func NewIssueProvider(paths []string) *IssueProvider {
+	return &IssueProvider{XMLProvider: XMLProvider[Issues]{paths: paths}}
+}
diff --git a/providers/pieces.go b/providers/pieces.go
new file mode 100644
index 0000000..84d7c9f
--- /dev/null
+++ b/providers/pieces.go
@@ -0,0 +1,92 @@
+package providers
+
+import (
+	"encoding/xml"
+	"fmt"
+)
+
+type PieceProvider struct {
+	XMLProvider[Pieces]
+}
+
+type Pieces struct {
+	XMLName xml.Name `xml:"beitraege"`
+	Piece   []Piece  `xml:"beitrag"`
+}
+
+type Piece struct {
+	ID            string          `xml:"id,attr"`
+	IssueRefs     []IssueRef      `xml:"stueck"`
+	PlaceRefs     []PlaceRef      `xml:"ort"`
+	CategoryRefs  []CategoryRef   `xml:"kategorie"`
+	AgentRefs     []AgentRef      `xml:"akteur"`
+	WorkRefs      []WorkRef       `xml:"werk"`
+	PieceRefs     []PieceRef      `xml:"beitrag"`
+	AdditionalRef []AdditionalRef `xml:"beilage"`
+	Incipit       []string        `xml:"incipit"`
+	Title         []string        `xml:"titel"`
+	AnnotationNote
+}
+
+type AdditionalRef struct {
+	Datum string `xml:"datum,attr"`
+	Nr    string `xml:"nr,attr"`
+	Von   string `xml:"von,attr"`
+	Bis   string `xml:"bis,attr"`
+	Value string `xml:",chardata"`
+}
+
+type IssueRef struct {
+	Datum    string `xml:"datum,attr"`
+	Nr       string `xml:"nr,attr"`
+	Von      string `xml:"von,attr"`
+	Bis      string `xml:"bis,attr"`
+	Value    string `xml:",chardata"`
+	Category string `xml:"kat,attr"`
+}
+
+type PlaceRef struct {
+	Ref      string `xml:"ref,attr"`
+	Value    string `xml:",chardata"`
+	Category string `xml:"kat,attr"`
+}
+
+type CategoryRef struct {
+	Ref   string `xml:"ref,attr"`
+	Value string `xml:",chardata"`
+}
+
+type WorkRef struct {
+	Ref      string `xml:"ref,attr"`
+	Value    string `xml:",chardata"`
+	Category string `xml:"kat,attr"`
+	Page     string `xml:"s,attr"`
+}
+
+type PieceRef struct {
+	Ref      string `xml:"ref,attr"`
+	Category string `xml:"kat,attr"`
+	Value    string `xml:",chardata"`
+}
+
+func (p Pieces) Append(data Pieces) Pieces {
+	p.Piece = append(p.Piece, data.Piece...)
+	return p
+}
+
+func (p Pieces) String() string {
+	var res []string
+	for _, piece := range p.Piece {
+		res = append(res, piece.String())
+	}
+
+	return fmt.Sprintf("Pieces: %v", res)
+}
+
+func (p *Piece) String() string {
+	return fmt.Sprintf("ID: %s\nIssueRefs: %v\nPlaceRefs: %v\nCategoryRefs: %v\nAgentRefs: %v\nWorkRefs: %v\nPieceRefs: %v\nAdditionalRef: %v\nIncipit: %v\nTitle: %v\nAnnotations: %v\nNotes: %v\n", p.ID, p.IssueRefs, p.PlaceRefs, p.CategoryRefs, p.AgentRefs, p.WorkRefs, p.PieceRefs, p.AdditionalRef, p.Incipit, p.Title, p.Annotations, p.Notes)
+}
+
+func NewPieceProvider(paths []string) *PieceProvider {
+	return &PieceProvider{XMLProvider: XMLProvider[Pieces]{paths: paths}}
+}
diff --git a/providers/places.go b/providers/places.go
new file mode 100644
index 0000000..97442fd
--- /dev/null
+++ b/providers/places.go
@@ -0,0 +1,45 @@
+package providers
+
+import (
+	"encoding/xml"
+	"fmt"
+)
+
+type PlaceProvider struct {
+	XMLProvider[Places]
+}
+
+type Places struct {
+	XMLName xml.Name `xml:"orte"`
+	Place   []Place  `xml:"ort"`
+}
+
+type Place struct {
+	ID       string   `xml:"id,attr"`
+	Names    []string `xml:"name"`
+	SortName string   `xml:"sortiername"`
+	Geo      string   `xml:"geonames"`
+	AnnotationNote
+}
+
+func (p Places) Append(data Places) Places {
+	p.Place = append(p.Place, data.Place...)
+	return p
+}
+
+func (p Places) String() string {
+	var res []string
+	for _, place := range p.Place {
+		res = append(res, place.String())
+	}
+
+	return fmt.Sprintf("Places: %v", res)
+}
+
+func (p *Place) String() string {
+	return fmt.Sprintf("ID: %s\nNames: %v\nSortName: %s\nGeo: %s\nAnnotations: %v\nNotes: %v\n", p.ID, p.Names, p.SortName, p.Geo, p.Annotations, p.Notes)
+}
+
+func NewPlaceProvider(paths []string) *PlaceProvider {
+	return &PlaceProvider{XMLProvider: XMLProvider[Places]{paths: paths}}
+}
diff --git a/providers/scans.go b/providers/scans.go
new file mode 100644
index 0000000..cf2a3ba
--- /dev/null
+++ b/providers/scans.go
@@ -0,0 +1 @@
+package providers
diff --git a/providers/works.go b/providers/works.go
new file mode 100644
index 0000000..f81f8c4
--- /dev/null
+++ b/providers/works.go
@@ -0,0 +1,56 @@
+package providers
+
+import (
+	"encoding/xml"
+	"fmt"
+)
+
+type WorkProvider struct {
+	XMLProvider[Works]
+}
+
+type Works struct {
+	XMLName xml.Name `xml:"werke"`
+	Work    []Work   `xml:"werk"`
+}
+
+type Work struct {
+	ID       string     `xml:"id,attr"`
+	URLs     []URL      `xml:"url"`
+	Citation []string   `xml:"zitation"`
+	Akteur   []AgentRef `xml:"akteur"`
+	AnnotationNote
+}
+
+type AgentRef struct {
+	Ref      string `xml:"ref,attr"`
+	Category string `xml:"Kat,attr"`
+	Value    string `xml:",chardata"`
+}
+
+type URL struct {
+	Address string `xml:"address,attr"`
+	Value   string `xml:",chardata"`
+}
+
+func (w Works) Append(data Works) Works {
+	w.Work = append(w.Work, data.Work...)
+	return w
+}
+
+func (w Works) String() string {
+	var res []string
+	for _, work := range w.Work {
+		res = append(res, work.String())
+	}
+
+	return fmt.Sprintf("Works: %v", res)
+}
+
+func (w *Work) String() string {
+	return fmt.Sprintf("ID: %s\nURLs: %v\nCitation: %v\nAnnotations: %v\nNotes: %v\n", w.ID, w.URLs, w.Citation, w.Annotations, w.Notes)
+}
+
+func NewWorkProvider(paths []string) *WorkProvider {
+	return &WorkProvider{XMLProvider: XMLProvider[Works]{paths: paths}}
+}
diff --git a/providers/xmlcommon.go b/providers/xmlcommon.go
new file mode 100644
index 0000000..55c38af
--- /dev/null
+++ b/providers/xmlcommon.go
@@ -0,0 +1,65 @@
+package providers
+
+import (
+	"encoding/xml"
+	"fmt"
+	"io"
+	"os"
+	"sync"
+)
+
+type KGPZXML[T any] interface {
+	Append(data T) T
+	fmt.Stringer
+}
+
+type XMLProvider[T KGPZXML[T]] struct {
+	mu    sync.Mutex
+	paths []string
+	Items T
+}
+
+func (p *XMLProvider[T]) Load() error {
+	var wg sync.WaitGroup
+	for _, path := range p.paths {
+		wg.Add(1)
+		go func(path string) {
+			defer wg.Done()
+			var data T
+			if err := UnmarshalFile(path, &data); err != nil {
+				fmt.Println(err)
+				return
+			}
+			p.mu.Lock()
+			p.Items = p.Items.Append(data)
+			p.mu.Unlock()
+		}(path)
+	}
+	wg.Wait()
+	return nil
+}
+
+func (a *XMLProvider[T]) String() string {
+	a.mu.Lock()
+	defer a.mu.Unlock()
+	return fmt.Sprintf("Items: %s", a.Items)
+}
+
+type AnnotationNote struct {
+	Annotations []string `xml:"anmerkung"`
+	Notes       []string `xml:"vermerk"`
+}
+
+func UnmarshalFile[T any](filename string, data *T) error {
+	xmlFile, err := os.Open(filename)
+	if err != nil {
+		fmt.Println(err)
+		return err
+	}
+	fmt.Println("Successfully opened " + filename)
+	defer xmlFile.Close()
+	byteValue, _ := io.ReadAll(xmlFile)
+	xml.Unmarshal(byteValue, data)
+
+	return nil
+}