The postcard shows the Parian Gate and the dome of one of the churches (no idea what church) inside the walled city. The Parian Gate, one of the 7 gates allowing access to Intramuros, was the only access that the Chinese traders were allowed to use. The Parian Gate directly faces Binondo, the Chinese section of Manila, and was the site of much commerce. The Chinese were forced to construct the walls of Intramuros.
Parian Gate Postcard