Cost: Free

Time: 10:00 AM – 12:00 PM (Core Workshop)


Optional Extended Session: 12:00 PM – 2:00 PM for additional practice, questions, and discussion

The Bayside Historical Society welcomes John Griffin of Griffin Gravestone Conservation for a hands-on workshop dedicated to the safe and respectful cleaning of historic gravestones. This program blends education, demonstration, and guided practice to help preserve the stories etched in stone.

Workshop Goals:

Why Gravestone Cleaning Matters


Discover the historical and cultural importance of cemeteries and why proper preservation protects legibility, dignity, and heritage. We’ll also cover when cleaning is appropriate — and when it’s best left undone — along with the ethics of cemetery work.

Stone Identification & Deterioration


Learn to recognize common gravestone materials, including marble, granite, slate, sandstone/brownstone, and limestone. Understand how to identify each type and spot common issues such as biological growth, flaking, cracking, and surface decay.

Safe Cleaning Practices

Learn about gravestone cleaning do's and don'ts, including best practices, what to avoid, and essential safety guidelines.

Live Demonstration

Watch step-by-step techniques, including assessing a gravestone before cleaning, proper wetting technique, gentle brushing methods, application of biological cleaner, and the final rinse process.

Hands-On Participant Practice

Put your knowledge into practice as you clean gravestones under expert supervision. Receive real-time guidance and feedback to ensure safe and effective techniques.

Wrap-Up & Optional Extended Practice

We’ll conclude with a Q&A session at noon. Participants are welcome to stay until 2:00 PM for additional hands-on cleaning, deeper discussion, and continued learning.

This workshop will take place at the Lawrence Cemetery in Bayside, which is located at the corner of 216th Street and 42nd Avenue. Please note:

• The site will require walking on uneven ground

• Long pants are recommended to protect your legs

• No restrooms are available on site

• Parking by the Lawrence Cemetery is limited

The scheduled rain date for this event is Sunday, May 17th. Please RSVP below.