diff --git a/hyphae/categories/categories.go b/hyphae/categories/categories.go
index 87f21d1..188ddb0 100644
--- a/hyphae/categories/categories.go
+++ b/hyphae/categories/categories.go
@@ -27,7 +27,11 @@ func WithHypha(hyphaName string) (categoryList []string) {
 func Contents(catName string) (hyphaList []string) {
 	mutex.RLock()
 	defer mutex.RUnlock()
-	return categoryToHyphae[catName].hyphaList
+	if node, ok := categoryToHyphae[catName]; ok {
+		return node.hyphaList
+	} else {
+		return nil
+	}
 }
 
 var mutex sync.RWMutex
diff --git a/views/categories.go b/views/categories.go
index 4b62fdc..d9cbdc3 100644
--- a/views/categories.go
+++ b/views/categories.go
@@ -2,9 +2,13 @@ package views
 
 import (
 	"github.com/bouncepaw/mycorrhiza/hyphae/categories"
+	"github.com/bouncepaw/mycorrhiza/l18n"
+	"github.com/bouncepaw/mycorrhiza/user"
 	"github.com/bouncepaw/mycorrhiza/util"
 	"html/template"
+	"io"
 	"log"
+	"net/http"
 	"strings"
 )
 
@@ -24,15 +28,42 @@ const categoriesCardTmpl = `{{$hyphaName := .HyphaName
 	{{end}}
 		<li class="categories-card__entry categories-card__add-to-cat">
 			<form method="POST" action="/add-to-category" class="categories-card__add-form">
-				<label for="_cat-name">
-				<input type="text">
+				<input type="text" name="cat" id="_cat-name">
+				<input type="hidden" name="hypha" value="{{$hyphaName}}">
 				<input type="submit" value="Add to category">
 			</form>
 		</li>
 	</ul>
 </aside>`
 
-var categoriesCardT *template.Template
+const categoryPageTmpl = `{{$catName := .CatName
+}}<main class="main-width category">
+	<h1>Category <i>{{$catName}}</i></h1>
+{{if len .Hyphae}}
+	<p>This page lists all hyphae in the category.</p>
+{{else}}
+	<p>This category has no hyphae.</p>
+{{end}}
+	<ul class="category__entries">
+	{{range .Hyphae}}
+		<li class="category__entry">
+			<a class="wikilink" href="/hypha/{{.}}">{{beautifulName .}}</a>
+		</li>
+	{{end}}
+		<li class="category__entry category__add-to-cat">
+			<form method="POST" action="/add-to-category" class="category__add-form">
+				<input type="text" name="hypha" id="_hypha-name" placeholder="Hypha name">
+				<input type="hidden" name="cat" value="{{$catName}}">
+				<input type="submit" value="Add hypha to category">
+			</form>
+		</li>
+	</ul>
+</main>`
+
+var (
+	categoriesCardT *template.Template
+	categoryPageT   *template.Template
+)
 
 func init() {
 	categoriesCardT = template.Must(template.
@@ -41,6 +72,12 @@ func init() {
 			"beautifulName": util.BeautifulName,
 		}).
 		Parse(categoriesCardTmpl))
+	categoryPageT = template.Must(template.
+		New("category page").
+		Funcs(template.FuncMap{
+			"beautifulName": util.BeautifulName,
+		}).
+		Parse(categoryPageTmpl))
 }
 
 func categoryCardHTML(hyphaName string) string {
@@ -57,3 +94,23 @@ func categoryCardHTML(hyphaName string) string {
 	}
 	return buf.String()
 }
+
+func CategoryPageHTML(w io.Writer, rq *http.Request, catName string) {
+	var buf strings.Builder
+	err := categoryPageT.Execute(&buf, struct {
+		CatName string
+		Hyphae  []string
+	}{
+		catName,
+		categories.Contents(catName),
+	})
+	if err != nil {
+		log.Println(err)
+	}
+	io.WriteString(w, BaseHTML(
+		"Category "+util.BeautifulName(catName),
+		buf.String(),
+		l18n.FromRequest(rq),
+		user.FromRequest(rq),
+	))
+}
diff --git a/web/categories.go b/web/categories.go
new file mode 100644
index 0000000..930cb03
--- /dev/null
+++ b/web/categories.go
@@ -0,0 +1,30 @@
+package web
+
+import (
+	"github.com/bouncepaw/mycorrhiza/util"
+	"github.com/bouncepaw/mycorrhiza/views"
+	"github.com/gorilla/mux"
+	"net/http"
+)
+
+func initCategories(r *mux.Router) {
+	r.PathPrefix("/add-to-category").HandlerFunc(handlerAddToCategory).Methods("POST")
+	r.PathPrefix("/remove-from-category").HandlerFunc(handlerRemoveFromCategory).Methods("POST")
+	r.PathPrefix("/category/").HandlerFunc(handlerCategory).Methods("GET")
+}
+
+func handlerCategory(w http.ResponseWriter, rq *http.Request) {
+	util.PrepareRq(rq)
+	var (
+		catName = util.HyphaNameFromRq(rq, "category")
+	)
+	views.CategoryPageHTML(w, rq, catName)
+}
+
+func handlerRemoveFromCategory(w http.ResponseWriter, rq *http.Request) {
+
+}
+
+func handlerAddToCategory(w http.ResponseWriter, rq *http.Request) {
+
+}
diff --git a/web/web.go b/web/web.go
index 6d6045b..1348208 100644
--- a/web/web.go
+++ b/web/web.go
@@ -108,6 +108,7 @@ func Handler() http.Handler {
 	initStuff(wikiRouter)
 	initSearch(wikiRouter)
 	initBacklinks(wikiRouter)
+	initCategories(wikiRouter)
 
 	// Admin routes.
 	if cfg.UseAuth {