diff --git a/src/main/java/it/polimi/ingsw/gc14/Model/Cards/Building/Effects/Building0.java b/src/main/java/it/polimi/ingsw/gc14/Model/Cards/Building/Effects/Building0.java
index 50a8fd9..292e1a7 100644
--- a/src/main/java/it/polimi/ingsw/gc14/Model/Cards/Building/Effects/Building0.java
+++ b/src/main/java/it/polimi/ingsw/gc14/Model/Cards/Building/Effects/Building0.java
@@ -10,13 +10,28 @@ import it.polimi.ingsw.gc14.Model.Cards.TribeCards.CharacterType;
 import java.util.ArrayList;
 import java.util.HashMap;
 
+/**
+ * From the moment you buy this building, every time you complete a set of 6 different characters, you gain 5 food.
+ * Note: sets of characters already present before purchasing the building do not count.
+ */
 public class Building0 extends BuildingCard {
 
+    /**
+     * The purchased attribute is used to indicate whether the card has already been initialized.
+     */
     boolean purchased ;
+
+    /**
+     * The numSet attribute indicates how many complete sets the player already has.
+     */
     private int numSet;
 
-
-
+    /**
+     * Constructor of the building
+     * @param era the game era of the building
+     * @param price the price (in food) of the building
+     * @param prestigeValue the number of Prestige Points gained from this building at the end of the game
+     */
     public Building0(int era,int price,int prestigeValue) {
         super(era,price,prestigeValue);
         effectType=EffectType.CARD_SET;
@@ -25,6 +40,11 @@ public class Building0 extends BuildingCard {
         numSet = 0;
     }
 
+    /**
+     * Method used to purchase the building. It also handles its initialization.
+     * @param player the player who buys the building
+     * @return the outcome of the operation
+     */
     @Override
     public boolean buy(Player player)
     {
@@ -34,6 +54,11 @@ public class Building0 extends BuildingCard {
         return true;
     }
 
+    /**
+     * Initializes the building by counting the number of complete sets at the moment of purchase.
+     * The building can only be initialized once.
+     * @param player the player who owns the building, whose cards are counted to determine the number of sets.
+     */
     public void initialize(Player player)
     {
         if(purchased)
@@ -49,10 +74,21 @@ public class Building0 extends BuildingCard {
         purchased = true;
     }
 
+    /**
+     * Method to clone the building: it creates an exact copy.
+     * @return the new copy of the building
+     */
     @Override
     public BuildingCard clone() {
         return new Building0(getEra(),getPrice(),getPrestigeValue());
     }
+
+    /**
+     * Calculates the current number of card sets and subtracts the previous value (i.e., the number of newly obtained sets).
+     * The player gains an amount of food equal to 5 times this result.
+     * @param player the player who owns the building
+     * @throws IllegalArgumentException thrown if the specified player does not own this card.
+     */
     @Override
     public void applyEffect(Player player) throws IllegalArgumentException {
         if(!player.buildingCards.contains(this))