The cross with Christ figure was created by Bulgarian artist Dimitri Petrov, who was living in Milanówek by the time. On the sides of the altar there are two stained-glass windows depicting angels. The stained-glass on the left was created by Antoni Dzierzbicki and founded by the followers of the church and the first pastor Leopold Jarosz in 1935. The stained-glass on the right was gifted by Maria Findstein in 1935. Both of them were made in S.G Żelański Stained Glass Factory in Cracow.