Some shops will paint tiles to order or copy a photograph.
The shop carries the works of about 75 artists, who paint tiles ranging from traditional to contemporary.
O'Keeffe kept her books, about 3,000 of them, in a compact room painted bright yellow with red floor tiles.
Hamlin School features a full wall of over 800 tiles painted by students and staff during the 1992-93 school year.
For each tile painted, the festival-goer could vote for the charity of their choice.
The lobbies' inside walls are inlaid with colorful tiles painted by children who live in the buildings.
'It was Paulo who told you that the owner of the house painted tiles?'
Two hundred of the tiles painted by schoolchildren greet visitors to the "Remember the Children" exhibition.
On the other side, perhaps a dozen people paint tiles, vases, lavabos and other pottery.
The barrel ceiling consists of aluminum painted tiles.