What are the two types of cemetery mausoleum styles?

Vestibule Mausoleum: This is a small structure, built like a house or a small ornate building with a door in the middle. A vestibule-style cemetery mausoleum enables visitors to enter the mausoleum to visit the deceased. Some vestibules are built with a small chapel where visitors can pray, or spend a meaningful time with beloved family members. Flowers and mementos may be placed inside the mausoleum. 

Sarcophagus Mausoleum: This is a closed, permanent structure with no doorway. It is not made to be entered, and is meant to be appreciated only from the outside.  The roof is lifted off and the casket is placed inside before it is sealed. The main part of the sarcophagus is above ground, but only one burial is visible above ground.  There may be a below-ground concrete burial chamber for additional interments. One benefit of sarcophagus interment is that it provides permanent protection from weather and outside interference.